Heart Failure

Empagliflozin and dulaglutide became the most-prescribed drugs in their respective classes for treating type 2 diabetes in the United States from July 2013 to June 2018, new research shows.

The findings, from U.S.-based administrative claims data, were published online in Diabetes Care by Chintan V. Dave, PharmD, PhD, and colleagues.

Among patients initiating oral sodium-glucose cotransporter 2 inhibitors (SGLT2 inhibitors) over the 5-year period, empagliflozin (Jardiance, Boehringer Ingelheim/Lilly) became the most commonly prescribed glucose-lowering drug, primarily driven by an increasing proportion of patients with diabetes who had a diagnosis of myocardial infarction, stroke, or heart failure (collectively called cardiovascular disease-heart failure [CVD-HF]).

And within the subcutaneous injectable glucagonlike peptide–1 receptor (GLP-1) agonist class, initiations of dulaglutide (Trulicity, Lilly) surpassed liraglutide in 2013-2018, although patients starting liraglutide (Victoza, Novo Nordisk) were more likely to have a CVD-HF diagnosis.

“This study shows that by preferring empagliflozin, prescribers have largely reacted in accordance with the available evidence and drug labels, while other factors such as lower price, frequency of administration [dulaglutide is given weekly and liraglutide is given daily], or prior authorizations may have led prescribers to select dulaglutide over liraglutide,” Dr. Dave, of the Division of Pharmacoepidemiology and Pharmacoeconomics, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, and colleagues wrote.

Internists and endocrinologists were the most frequent prescribers of both drug classes, but cardiologists rarely prescribed them, even for patients with established CVD-HF. “As patients with co-occurring diabetes and CVD are likely to see their cardiologist, these encounters may provide an additional opportunity to optimize their treatment,” the authors emphasized.

SGLT2 inhibitors and label changes

Over the study period, the proportion of patients who had CVD-HF and who received SGLT2 inhibitors rose by 3.4 percentage points, from 8.8% to 12.2% (P trend < .001).

The proportion of overall prescriptions for SGLT2 inhibitors written by endocrinologists dropped by 12.0%, although the absolute number of SGLT2-inhibitor prescriptions written by endocrinologists increased (P < .001).

The proportion written by internists did not change (P = .58), whereas it increased slightly among cardiologists but still barely exceeded 1% (P < .001). The findings were similar for the subgroup of patients with CVD-HF who initiated SGLT2 inhibitors.

By individual agents, canagliflozin (Invokana, Janssen) prescriptions dropped by 75.1 percentage points over the study period, from 100% in 2013 to just 24.9% by 2018 (P < .001), whereas empagliflozin initiation rose by 51.7 percentage points, from 13.9% to 65.6% of all SGLT2 inhibitor initiations (P < .001).

Among those initiating empagliflozin, the proportion with CVD-HF rose by 5.3 percentage points, from 8.8% to 14.1% (P < .001), mostly after the additional indication for reducing CV events and death was added to the U.S. label in December 2016.

In contrast, there were no significant changes in the proportions of those with CVD-HF who initiated canagliflozin (P = 065), dapagliflozin (P = .87), or other medications (P = .060).

“Changes in the drug label for canagliflozin (boxed warning for amputation) and empagliflozin (for reduction in CV events and death) in 2016 likely contributed to a rapid change in prescribing preference for empagliflozin,” Dr. Dave and colleagues wrote.
 

GLP-1 agonists and frequency

Among the patients starting GLP-1 agonists, the proportion with CVD-HF increased by 3.9 percentage points, from 10.5% to 14.4% (P < .001) during the study period.

Prescriptions by endocrinologists declined as a proportion, but rose in absolute numbers (P < .001), and remained consistent for internists (> 55%; P = .12).

Prescribing of GLP-1 agonists by cardiologists remained low (< 0.5%) and was not higher for individuals with CVD-HF.

By individual GLP-1 agonist, liraglutide initiation declined by 32.1 percentage points, from 72.4% to 40.3% of GLP-1 agonist initiations (P < .001), whereas dulaglutide initiation rose by 43.8 percentage points, from 5.0% to 48.8% (P < .001). Again, these trends were similar in the subgroup of patients with CVD-HF.

The proportion of patients with CVD-HF in liraglutide initiators increased by 5.1 percentage points, from 10.5% to 15.6% (P = .018), and in exenatide initiators by 2.1 percentage points, from 10.3% to 13.8% (P = .77).

“Due to the reduced frequency of administration and possible formulary preferences, dulaglutide initiations surpassed liraglutide, the only GLP-1 agonist with evidence of CV benefit at the time,” Dr. Dave and colleagues noted.

Dulaglutide has just been granted an additional approval by the Food and Drug Administration for reducing the risk of major adverse cardiovascular events in adults with type 2 diabetes with and without established CVD or multiple CV risk factors. That makes it the first and only type 2 diabetes medicine approved to reduce the risk of CV events for both primary and secondary prevention populations.

The study was funded by the Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston. Dr. Dave has reported receiving support from the New Jersey Alliance for Clinical and Translational Science.
 

This article first appeared on Medscape.com.

Empagliflozin and dulaglutide became the most-prescribed drugs in their respective classes for treating type 2 diabetes in the United States from July 2013 to June 2018, new research shows.

The findings, from U.S.-based administrative claims data, were published online in Diabetes Care by Chintan V. Dave, PharmD, PhD, and colleagues.

Among patients initiating oral sodium-glucose cotransporter 2 inhibitors (SGLT2 inhibitors) over the 5-year period, empagliflozin (Jardiance, Boehringer Ingelheim/Lilly) became the most commonly prescribed glucose-lowering drug, primarily driven by an increasing proportion of patients with diabetes who had a diagnosis of myocardial infarction, stroke, or heart failure (collectively called cardiovascular disease-heart failure [CVD-HF]).

And within the subcutaneous injectable glucagonlike peptide–1 receptor (GLP-1) agonist class, initiations of dulaglutide (Trulicity, Lilly) surpassed liraglutide in 2013-2018, although patients starting liraglutide (Victoza, Novo Nordisk) were more likely to have a CVD-HF diagnosis.

“This study shows that by preferring empagliflozin, prescribers have largely reacted in accordance with the available evidence and drug labels, while other factors such as lower price, frequency of administration [dulaglutide is given weekly and liraglutide is given daily], or prior authorizations may have led prescribers to select dulaglutide over liraglutide,” Dr. Dave, of the Division of Pharmacoepidemiology and Pharmacoeconomics, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, and colleagues wrote.

Internists and endocrinologists were the most frequent prescribers of both drug classes, but cardiologists rarely prescribed them, even for patients with established CVD-HF. “As patients with co-occurring diabetes and CVD are likely to see their cardiologist, these encounters may provide an additional opportunity to optimize their treatment,” the authors emphasized.

SGLT2 inhibitors and label changes

Over the study period, the proportion of patients who had CVD-HF and who received SGLT2 inhibitors rose by 3.4 percentage points, from 8.8% to 12.2% (P trend < .001).

The proportion of overall prescriptions for SGLT2 inhibitors written by endocrinologists dropped by 12.0%, although the absolute number of SGLT2-inhibitor prescriptions written by endocrinologists increased (P < .001).

The proportion written by internists did not change (P = .58), whereas it increased slightly among cardiologists but still barely exceeded 1% (P < .001). The findings were similar for the subgroup of patients with CVD-HF who initiated SGLT2 inhibitors.

By individual agents, canagliflozin (Invokana, Janssen) prescriptions dropped by 75.1 percentage points over the study period, from 100% in 2013 to just 24.9% by 2018 (P < .001), whereas empagliflozin initiation rose by 51.7 percentage points, from 13.9% to 65.6% of all SGLT2 inhibitor initiations (P < .001).

Among those initiating empagliflozin, the proportion with CVD-HF rose by 5.3 percentage points, from 8.8% to 14.1% (P < .001), mostly after the additional indication for reducing CV events and death was added to the U.S. label in December 2016.

In contrast, there were no significant changes in the proportions of those with CVD-HF who initiated canagliflozin (P = 065), dapagliflozin (P = .87), or other medications (P = .060).

“Changes in the drug label for canagliflozin (boxed warning for amputation) and empagliflozin (for reduction in CV events and death) in 2016 likely contributed to a rapid change in prescribing preference for empagliflozin,” Dr. Dave and colleagues wrote.
 

GLP-1 agonists and frequency

Among the patients starting GLP-1 agonists, the proportion with CVD-HF increased by 3.9 percentage points, from 10.5% to 14.4% (P < .001) during the study period.

Prescriptions by endocrinologists declined as a proportion, but rose in absolute numbers (P < .001), and remained consistent for internists (> 55%; P = .12).

Prescribing of GLP-1 agonists by cardiologists remained low (< 0.5%) and was not higher for individuals with CVD-HF.

By individual GLP-1 agonist, liraglutide initiation declined by 32.1 percentage points, from 72.4% to 40.3% of GLP-1 agonist initiations (P < .001), whereas dulaglutide initiation rose by 43.8 percentage points, from 5.0% to 48.8% (P < .001). Again, these trends were similar in the subgroup of patients with CVD-HF.

The proportion of patients with CVD-HF in liraglutide initiators increased by 5.1 percentage points, from 10.5% to 15.6% (P = .018), and in exenatide initiators by 2.1 percentage points, from 10.3% to 13.8% (P = .77).

“Due to the reduced frequency of administration and possible formulary preferences, dulaglutide initiations surpassed liraglutide, the only GLP-1 agonist with evidence of CV benefit at the time,” Dr. Dave and colleagues noted.

Dulaglutide has just been granted an additional approval by the Food and Drug Administration for reducing the risk of major adverse cardiovascular events in adults with type 2 diabetes with and without established CVD or multiple CV risk factors. That makes it the first and only type 2 diabetes medicine approved to reduce the risk of CV events for both primary and secondary prevention populations.

The study was funded by the Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston. Dr. Dave has reported receiving support from the New Jersey Alliance for Clinical and Translational Science.
 

This article first appeared on Medscape.com.

Empagliflozin and dulaglutide became the most-prescribed drugs in their respective classes for treating type 2 diabetes in the United States from July 2013 to June 2018, new research shows.

The findings, from U.S.-based administrative claims data, were published online in Diabetes Care by Chintan V. Dave, PharmD, PhD, and colleagues.

Among patients initiating oral sodium-glucose cotransporter 2 inhibitors (SGLT2 inhibitors) over the 5-year period, empagliflozin (Jardiance, Boehringer Ingelheim/Lilly) became the most commonly prescribed glucose-lowering drug, primarily driven by an increasing proportion of patients with diabetes who had a diagnosis of myocardial infarction, stroke, or heart failure (collectively called cardiovascular disease-heart failure [CVD-HF]).

And within the subcutaneous injectable glucagonlike peptide–1 receptor (GLP-1) agonist class, initiations of dulaglutide (Trulicity, Lilly) surpassed liraglutide in 2013-2018, although patients starting liraglutide (Victoza, Novo Nordisk) were more likely to have a CVD-HF diagnosis.

“This study shows that by preferring empagliflozin, prescribers have largely reacted in accordance with the available evidence and drug labels, while other factors such as lower price, frequency of administration [dulaglutide is given weekly and liraglutide is given daily], or prior authorizations may have led prescribers to select dulaglutide over liraglutide,” Dr. Dave, of the Division of Pharmacoepidemiology and Pharmacoeconomics, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, and colleagues wrote.

Internists and endocrinologists were the most frequent prescribers of both drug classes, but cardiologists rarely prescribed them, even for patients with established CVD-HF. “As patients with co-occurring diabetes and CVD are likely to see their cardiologist, these encounters may provide an additional opportunity to optimize their treatment,” the authors emphasized.

SGLT2 inhibitors and label changes

Over the study period, the proportion of patients who had CVD-HF and who received SGLT2 inhibitors rose by 3.4 percentage points, from 8.8% to 12.2% (P trend < .001).

The proportion of overall prescriptions for SGLT2 inhibitors written by endocrinologists dropped by 12.0%, although the absolute number of SGLT2-inhibitor prescriptions written by endocrinologists increased (P < .001).

The proportion written by internists did not change (P = .58), whereas it increased slightly among cardiologists but still barely exceeded 1% (P < .001). The findings were similar for the subgroup of patients with CVD-HF who initiated SGLT2 inhibitors.

By individual agents, canagliflozin (Invokana, Janssen) prescriptions dropped by 75.1 percentage points over the study period, from 100% in 2013 to just 24.9% by 2018 (P < .001), whereas empagliflozin initiation rose by 51.7 percentage points, from 13.9% to 65.6% of all SGLT2 inhibitor initiations (P < .001).

Among those initiating empagliflozin, the proportion with CVD-HF rose by 5.3 percentage points, from 8.8% to 14.1% (P < .001), mostly after the additional indication for reducing CV events and death was added to the U.S. label in December 2016.

In contrast, there were no significant changes in the proportions of those with CVD-HF who initiated canagliflozin (P = 065), dapagliflozin (P = .87), or other medications (P = .060).

“Changes in the drug label for canagliflozin (boxed warning for amputation) and empagliflozin (for reduction in CV events and death) in 2016 likely contributed to a rapid change in prescribing preference for empagliflozin,” Dr. Dave and colleagues wrote.
 

GLP-1 agonists and frequency

Among the patients starting GLP-1 agonists, the proportion with CVD-HF increased by 3.9 percentage points, from 10.5% to 14.4% (P < .001) during the study period.

Prescriptions by endocrinologists declined as a proportion, but rose in absolute numbers (P < .001), and remained consistent for internists (> 55%; P = .12).

Prescribing of GLP-1 agonists by cardiologists remained low (< 0.5%) and was not higher for individuals with CVD-HF.

By individual GLP-1 agonist, liraglutide initiation declined by 32.1 percentage points, from 72.4% to 40.3% of GLP-1 agonist initiations (P < .001), whereas dulaglutide initiation rose by 43.8 percentage points, from 5.0% to 48.8% (P < .001). Again, these trends were similar in the subgroup of patients with CVD-HF.

The proportion of patients with CVD-HF in liraglutide initiators increased by 5.1 percentage points, from 10.5% to 15.6% (P = .018), and in exenatide initiators by 2.1 percentage points, from 10.3% to 13.8% (P = .77).

“Due to the reduced frequency of administration and possible formulary preferences, dulaglutide initiations surpassed liraglutide, the only GLP-1 agonist with evidence of CV benefit at the time,” Dr. Dave and colleagues noted.

Dulaglutide has just been granted an additional approval by the Food and Drug Administration for reducing the risk of major adverse cardiovascular events in adults with type 2 diabetes with and without established CVD or multiple CV risk factors. That makes it the first and only type 2 diabetes medicine approved to reduce the risk of CV events for both primary and secondary prevention populations.

The study was funded by the Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston. Dr. Dave has reported receiving support from the New Jersey Alliance for Clinical and Translational Science.
 

This article first appeared on Medscape.com.

SNOWMASS, COLO. – If ever there was a major chronic disease that’s teed up and ready to be stamped into submission through diligent application of preventive medicine, it’s the epidemic of heart failure.

Bruce Jancin/MDedge News

“The best way to treat heart failure is to prevent it in the first place. There will be more than 1 million new cases of heart failure this year, and the vast majority of them could have been prevented,” Gregg C. Fonarow, MD, asserted at the annual Cardiovascular Conference at Snowmass sponsored by the American College of Cardiology.

Using firmly evidence-based, guideline-directed therapies, it’s often possible to prevent patients at high risk for developing heart failure (HF) from actually doing so. Or, in the terminology of the ACC/American Heart Association heart failure guidelines coauthored by Dr. Fonarow, the goal is to keep patients who are stage A – that is, pre-HF but at high risk because of hypertension, coronary artery disease, diabetes, family history of cardiomyopathy, or other reasons – from progressing to stage B, marked by asymptomatic left ventricular dysfunction, a prior MI, or asymptomatic valvular disease; and blocking those who are stage B from then moving on to stage C, the classic symptomatic form of HF; and thence to end-stage stage D disease.

Heart failure is an enormous public health problem, and one of the most expensive of all diseases. The prognostic impact of newly diagnosed HF is profound, with 10-15 years of life lost, compared with the general population. Even today, roughly one in five newly diagnosed patients won’t survive for a year, and the 5-year mortality is about 50%, said Dr. Fonarow, who is professor of cardiovascular medicine and chief of the division of cardiology at the University of California, Los Angeles, and director of the Ahmanson-UCLA Cardiomyopathy Center, also in Los Angeles.

Symptomatic stage C is “the tip of the iceberg,” the cardiologist stressed. Vastly more patients are in stages A and B. In order to keep them from progressing to stage C, it’s first necessary to identify them. That’s why the 2013 guidelines give a class IC recommendation for periodic evaluation for signs and symptoms of HF in patients who are at high risk, and for a noninvasive assessment of left ventricular ejection fraction in those with a strong family history of cardiomyopathy or who are on cardiotoxic drugs (J Am Coll Cardiol. 2013 Oct 15;62[16]:e147-239).

The two biggest risk factors for the development of symptomatic stage C HF are hypertension and atherosclerotic cardiovascular disease. Close to 80% of patients presenting with heart failure have prevalent hypertension, and a history of ischemic heart disease is nearly as common.

Other major modifiable risk factors are diabetes, overweight and obesity, metabolic syndrome, dyslipidemia, smoking, valvular heart disease, and chronic kidney disease.
 

Hypertension

Most patients with high blood pressure believe they’re on antihypertensive medication to prevent MI and stroke, but in reality the largest benefit is what Dr. Fonarow termed the “phenomenal” reduction in the risk of developing HF, which amounted to a 52% relative risk reduction in one meta-analysis of older randomized trials. In the contemporary era, the landmark SPRINT trial of close to 10,000 randomized hypertensive patients showed that more-intensive blood pressure lowering to a target systolic BP of less than 120 mm Hg resulted in a 38% reduction in the risk of new-onset HF, compared with standard treatment to a target of less than 140 mm Hg. That’s why the 2017 focused update of the HF guidelines gives a strong class IB recommendation for a target blood pressure of less than 130/80 mm Hg in hypertensive patients with stage A HF (J Am Coll Cardiol. 2017 Aug 8;70[6]:776-803).

Atherosclerotic cardiovascular disease

Within 6 years after diagnosis of an MI, 22% of men and 46% of women will develop symptomatic heart failure. Intensive statin therapy gets a strong recommendation post MI in the guidelines, not only because in a meta-analysis of four major randomized trials it resulted in a further 64% reduction in the risk of coronary death or recurrent MI, compared with moderate statin therapy, but also because of the 27% relative risk reduction in new-onset HF. ACE inhibitors get a class IA recommendation for prevention of symptomatic HF in patients who are stage A with a history of atherosclerotic disease, diabetes, or hypertension. Angiotensin receptor blockers get a class IC recommendation.

Diabetes

Diabetes markedly increases the risk of developing HF: by two to four times overall and by four to eight times in younger diabetes patients. The two chronic diseases are highly comorbid, with roughly 45% of patients with HF also having diabetes. Moreover, diabetes in HF patients is associated with a substantially worse prognosis, even when standard HF therapies are applied.

Choices regarding glycemic management can markedly affect HF risk and outcomes. Randomized trials show that the peroxisome proliferator-activated receptor agonists double the risk of HF. The glucagonlike peptide–1 receptor agonists are absolutely neutral with regard to HF outcomes. Similarly, the dipeptidyl peptidase–4 inhibitors have no impact on the risks of major adverse cardiovascular events or HF. Intensive glycemic control has no impact on the risk of new-onset HF. Insulin therapy, too, is neutral on this score.

“Depressingly, even lifestyle modification with weight loss, once you have type 2 diabetes, does not lower the risk,” Dr. Fonarow continued.

In contrast, the sodium-glucose transporter 2 (SGLT2) inhibitors have impressive cardiovascular and renal protective benefits in patients with type 2 diabetes, as demonstrated in a meta-analysis of more than 34,000 participants in the randomized trials of empagliflozin (Jardiance) in EMPA-REG OUTCOME, canagliflozin (Invokana) in CANVAS/CANVAS-R, and dapagliflozin (Farxiga) in DECLARE-TIMI 58. The SGLT2 inhibitors collectively reduced the risk of HF hospitalization by 21% in participants with no baseline history of the disease and by 29% in those with a history of HF. Moreover, the risk of progression of renal disease was reduced by 45% (Lancet. 2019 Jan 5;393[10166]:31-9).

More recently, the landmark DAPA-HF trial established SGLT2 inhibitor therapy as part of standard-of-care, guideline-directed medical therapy for patients with HF with reduced ejection fraction regardless of whether they have comorbid type 2 diabetes (N Engl J Med. 2019 Nov 21;381[21]:1995-2008).

These are remarkable medications, generally very well tolerated, and it’s critical that cardiologists get on board in prescribing them, Dr. Fonarow emphasized. He alerted his colleagues to what he called an “incredibly helpful” review article that provides practical guidance for cardiologists in how to start using the SGLT2 inhibitors (JACC Heart Fail. 2019 Feb;7[2]:169-72).

“It’s pretty straightforward,” according to Dr. Fonarow. “If you’re comfortable enough in using ACE inhibitors, angiotensin receptor blockers, and beta-blockers, I think you’ll find these medications fit similarly when you actually get experience in utilizing them.”

He reported serving as a consultant to 10 pharmaceutical or medical device companies.

bjancin@mdedge.com

SNOWMASS, COLO. – If ever there was a major chronic disease that’s teed up and ready to be stamped into submission through diligent application of preventive medicine, it’s the epidemic of heart failure.

Bruce Jancin/MDedge News

“The best way to treat heart failure is to prevent it in the first place. There will be more than 1 million new cases of heart failure this year, and the vast majority of them could have been prevented,” Gregg C. Fonarow, MD, asserted at the annual Cardiovascular Conference at Snowmass sponsored by the American College of Cardiology.

Using firmly evidence-based, guideline-directed therapies, it’s often possible to prevent patients at high risk for developing heart failure (HF) from actually doing so. Or, in the terminology of the ACC/American Heart Association heart failure guidelines coauthored by Dr. Fonarow, the goal is to keep patients who are stage A – that is, pre-HF but at high risk because of hypertension, coronary artery disease, diabetes, family history of cardiomyopathy, or other reasons – from progressing to stage B, marked by asymptomatic left ventricular dysfunction, a prior MI, or asymptomatic valvular disease; and blocking those who are stage B from then moving on to stage C, the classic symptomatic form of HF; and thence to end-stage stage D disease.

Heart failure is an enormous public health problem, and one of the most expensive of all diseases. The prognostic impact of newly diagnosed HF is profound, with 10-15 years of life lost, compared with the general population. Even today, roughly one in five newly diagnosed patients won’t survive for a year, and the 5-year mortality is about 50%, said Dr. Fonarow, who is professor of cardiovascular medicine and chief of the division of cardiology at the University of California, Los Angeles, and director of the Ahmanson-UCLA Cardiomyopathy Center, also in Los Angeles.

Symptomatic stage C is “the tip of the iceberg,” the cardiologist stressed. Vastly more patients are in stages A and B. In order to keep them from progressing to stage C, it’s first necessary to identify them. That’s why the 2013 guidelines give a class IC recommendation for periodic evaluation for signs and symptoms of HF in patients who are at high risk, and for a noninvasive assessment of left ventricular ejection fraction in those with a strong family history of cardiomyopathy or who are on cardiotoxic drugs (J Am Coll Cardiol. 2013 Oct 15;62[16]:e147-239).

The two biggest risk factors for the development of symptomatic stage C HF are hypertension and atherosclerotic cardiovascular disease. Close to 80% of patients presenting with heart failure have prevalent hypertension, and a history of ischemic heart disease is nearly as common.

Other major modifiable risk factors are diabetes, overweight and obesity, metabolic syndrome, dyslipidemia, smoking, valvular heart disease, and chronic kidney disease.
 

Hypertension

Most patients with high blood pressure believe they’re on antihypertensive medication to prevent MI and stroke, but in reality the largest benefit is what Dr. Fonarow termed the “phenomenal” reduction in the risk of developing HF, which amounted to a 52% relative risk reduction in one meta-analysis of older randomized trials. In the contemporary era, the landmark SPRINT trial of close to 10,000 randomized hypertensive patients showed that more-intensive blood pressure lowering to a target systolic BP of less than 120 mm Hg resulted in a 38% reduction in the risk of new-onset HF, compared with standard treatment to a target of less than 140 mm Hg. That’s why the 2017 focused update of the HF guidelines gives a strong class IB recommendation for a target blood pressure of less than 130/80 mm Hg in hypertensive patients with stage A HF (J Am Coll Cardiol. 2017 Aug 8;70[6]:776-803).

Atherosclerotic cardiovascular disease

Within 6 years after diagnosis of an MI, 22% of men and 46% of women will develop symptomatic heart failure. Intensive statin therapy gets a strong recommendation post MI in the guidelines, not only because in a meta-analysis of four major randomized trials it resulted in a further 64% reduction in the risk of coronary death or recurrent MI, compared with moderate statin therapy, but also because of the 27% relative risk reduction in new-onset HF. ACE inhibitors get a class IA recommendation for prevention of symptomatic HF in patients who are stage A with a history of atherosclerotic disease, diabetes, or hypertension. Angiotensin receptor blockers get a class IC recommendation.

Diabetes

Diabetes markedly increases the risk of developing HF: by two to four times overall and by four to eight times in younger diabetes patients. The two chronic diseases are highly comorbid, with roughly 45% of patients with HF also having diabetes. Moreover, diabetes in HF patients is associated with a substantially worse prognosis, even when standard HF therapies are applied.

Choices regarding glycemic management can markedly affect HF risk and outcomes. Randomized trials show that the peroxisome proliferator-activated receptor agonists double the risk of HF. The glucagonlike peptide–1 receptor agonists are absolutely neutral with regard to HF outcomes. Similarly, the dipeptidyl peptidase–4 inhibitors have no impact on the risks of major adverse cardiovascular events or HF. Intensive glycemic control has no impact on the risk of new-onset HF. Insulin therapy, too, is neutral on this score.

“Depressingly, even lifestyle modification with weight loss, once you have type 2 diabetes, does not lower the risk,” Dr. Fonarow continued.

In contrast, the sodium-glucose transporter 2 (SGLT2) inhibitors have impressive cardiovascular and renal protective benefits in patients with type 2 diabetes, as demonstrated in a meta-analysis of more than 34,000 participants in the randomized trials of empagliflozin (Jardiance) in EMPA-REG OUTCOME, canagliflozin (Invokana) in CANVAS/CANVAS-R, and dapagliflozin (Farxiga) in DECLARE-TIMI 58. The SGLT2 inhibitors collectively reduced the risk of HF hospitalization by 21% in participants with no baseline history of the disease and by 29% in those with a history of HF. Moreover, the risk of progression of renal disease was reduced by 45% (Lancet. 2019 Jan 5;393[10166]:31-9).

More recently, the landmark DAPA-HF trial established SGLT2 inhibitor therapy as part of standard-of-care, guideline-directed medical therapy for patients with HF with reduced ejection fraction regardless of whether they have comorbid type 2 diabetes (N Engl J Med. 2019 Nov 21;381[21]:1995-2008).

These are remarkable medications, generally very well tolerated, and it’s critical that cardiologists get on board in prescribing them, Dr. Fonarow emphasized. He alerted his colleagues to what he called an “incredibly helpful” review article that provides practical guidance for cardiologists in how to start using the SGLT2 inhibitors (JACC Heart Fail. 2019 Feb;7[2]:169-72).

“It’s pretty straightforward,” according to Dr. Fonarow. “If you’re comfortable enough in using ACE inhibitors, angiotensin receptor blockers, and beta-blockers, I think you’ll find these medications fit similarly when you actually get experience in utilizing them.”

He reported serving as a consultant to 10 pharmaceutical or medical device companies.

bjancin@mdedge.com

SNOWMASS, COLO. – If ever there was a major chronic disease that’s teed up and ready to be stamped into submission through diligent application of preventive medicine, it’s the epidemic of heart failure.

Bruce Jancin/MDedge News

“The best way to treat heart failure is to prevent it in the first place. There will be more than 1 million new cases of heart failure this year, and the vast majority of them could have been prevented,” Gregg C. Fonarow, MD, asserted at the annual Cardiovascular Conference at Snowmass sponsored by the American College of Cardiology.

Using firmly evidence-based, guideline-directed therapies, it’s often possible to prevent patients at high risk for developing heart failure (HF) from actually doing so. Or, in the terminology of the ACC/American Heart Association heart failure guidelines coauthored by Dr. Fonarow, the goal is to keep patients who are stage A – that is, pre-HF but at high risk because of hypertension, coronary artery disease, diabetes, family history of cardiomyopathy, or other reasons – from progressing to stage B, marked by asymptomatic left ventricular dysfunction, a prior MI, or asymptomatic valvular disease; and blocking those who are stage B from then moving on to stage C, the classic symptomatic form of HF; and thence to end-stage stage D disease.

Heart failure is an enormous public health problem, and one of the most expensive of all diseases. The prognostic impact of newly diagnosed HF is profound, with 10-15 years of life lost, compared with the general population. Even today, roughly one in five newly diagnosed patients won’t survive for a year, and the 5-year mortality is about 50%, said Dr. Fonarow, who is professor of cardiovascular medicine and chief of the division of cardiology at the University of California, Los Angeles, and director of the Ahmanson-UCLA Cardiomyopathy Center, also in Los Angeles.

Symptomatic stage C is “the tip of the iceberg,” the cardiologist stressed. Vastly more patients are in stages A and B. In order to keep them from progressing to stage C, it’s first necessary to identify them. That’s why the 2013 guidelines give a class IC recommendation for periodic evaluation for signs and symptoms of HF in patients who are at high risk, and for a noninvasive assessment of left ventricular ejection fraction in those with a strong family history of cardiomyopathy or who are on cardiotoxic drugs (J Am Coll Cardiol. 2013 Oct 15;62[16]:e147-239).

The two biggest risk factors for the development of symptomatic stage C HF are hypertension and atherosclerotic cardiovascular disease. Close to 80% of patients presenting with heart failure have prevalent hypertension, and a history of ischemic heart disease is nearly as common.

Other major modifiable risk factors are diabetes, overweight and obesity, metabolic syndrome, dyslipidemia, smoking, valvular heart disease, and chronic kidney disease.
 

Hypertension

Most patients with high blood pressure believe they’re on antihypertensive medication to prevent MI and stroke, but in reality the largest benefit is what Dr. Fonarow termed the “phenomenal” reduction in the risk of developing HF, which amounted to a 52% relative risk reduction in one meta-analysis of older randomized trials. In the contemporary era, the landmark SPRINT trial of close to 10,000 randomized hypertensive patients showed that more-intensive blood pressure lowering to a target systolic BP of less than 120 mm Hg resulted in a 38% reduction in the risk of new-onset HF, compared with standard treatment to a target of less than 140 mm Hg. That’s why the 2017 focused update of the HF guidelines gives a strong class IB recommendation for a target blood pressure of less than 130/80 mm Hg in hypertensive patients with stage A HF (J Am Coll Cardiol. 2017 Aug 8;70[6]:776-803).

Atherosclerotic cardiovascular disease

Within 6 years after diagnosis of an MI, 22% of men and 46% of women will develop symptomatic heart failure. Intensive statin therapy gets a strong recommendation post MI in the guidelines, not only because in a meta-analysis of four major randomized trials it resulted in a further 64% reduction in the risk of coronary death or recurrent MI, compared with moderate statin therapy, but also because of the 27% relative risk reduction in new-onset HF. ACE inhibitors get a class IA recommendation for prevention of symptomatic HF in patients who are stage A with a history of atherosclerotic disease, diabetes, or hypertension. Angiotensin receptor blockers get a class IC recommendation.

Diabetes

Diabetes markedly increases the risk of developing HF: by two to four times overall and by four to eight times in younger diabetes patients. The two chronic diseases are highly comorbid, with roughly 45% of patients with HF also having diabetes. Moreover, diabetes in HF patients is associated with a substantially worse prognosis, even when standard HF therapies are applied.

Choices regarding glycemic management can markedly affect HF risk and outcomes. Randomized trials show that the peroxisome proliferator-activated receptor agonists double the risk of HF. The glucagonlike peptide–1 receptor agonists are absolutely neutral with regard to HF outcomes. Similarly, the dipeptidyl peptidase–4 inhibitors have no impact on the risks of major adverse cardiovascular events or HF. Intensive glycemic control has no impact on the risk of new-onset HF. Insulin therapy, too, is neutral on this score.

“Depressingly, even lifestyle modification with weight loss, once you have type 2 diabetes, does not lower the risk,” Dr. Fonarow continued.

In contrast, the sodium-glucose transporter 2 (SGLT2) inhibitors have impressive cardiovascular and renal protective benefits in patients with type 2 diabetes, as demonstrated in a meta-analysis of more than 34,000 participants in the randomized trials of empagliflozin (Jardiance) in EMPA-REG OUTCOME, canagliflozin (Invokana) in CANVAS/CANVAS-R, and dapagliflozin (Farxiga) in DECLARE-TIMI 58. The SGLT2 inhibitors collectively reduced the risk of HF hospitalization by 21% in participants with no baseline history of the disease and by 29% in those with a history of HF. Moreover, the risk of progression of renal disease was reduced by 45% (Lancet. 2019 Jan 5;393[10166]:31-9).

More recently, the landmark DAPA-HF trial established SGLT2 inhibitor therapy as part of standard-of-care, guideline-directed medical therapy for patients with HF with reduced ejection fraction regardless of whether they have comorbid type 2 diabetes (N Engl J Med. 2019 Nov 21;381[21]:1995-2008).

These are remarkable medications, generally very well tolerated, and it’s critical that cardiologists get on board in prescribing them, Dr. Fonarow emphasized. He alerted his colleagues to what he called an “incredibly helpful” review article that provides practical guidance for cardiologists in how to start using the SGLT2 inhibitors (JACC Heart Fail. 2019 Feb;7[2]:169-72).

“It’s pretty straightforward,” according to Dr. Fonarow. “If you’re comfortable enough in using ACE inhibitors, angiotensin receptor blockers, and beta-blockers, I think you’ll find these medications fit similarly when you actually get experience in utilizing them.”

He reported serving as a consultant to 10 pharmaceutical or medical device companies.

bjancin@mdedge.com

Clinical trials supporting Food and Drug Adminstration approval of contemporary cancer therapies frequently failed to capture major adverse cardiovascular events (MACE) and, when they did, reported rates 2.6-fold lower than noncancer trials, new research shows.

Overall, 51.3% of trials did not report MACE, with that number reaching 57.6% in trials enrolling patients with baseline cardiovascular disease (CVD).

Nearly 40% of trials did not report any CVD events in follow-up, the authors reported online Feb. 10, 2020, in the Journal of the American College of Cardiology (2020;75:620-8).

“Even in drug classes where there were established or emerging associations with cardiotoxic events, often there were no reported heart events or cardiovascular events across years of follow-up in trials that examined hundreds or even thousands of patients. That was actually pretty surprising,” senior author Daniel Addison, MD, codirector of the cardio-oncology program at the Ohio State University Medical Center, Columbus, said in an interview.

The study was prompted by a series of events that crescendoed when his team was called to the ICU to determine whether a novel targeted agent played a role in the heart decline of a patient with acute myeloid leukemia. “I had a resident ask me a very important question: ‘How do we really know for sure that the trial actually reflects the true risk of heart events?’ to which I told him, ‘it’s difficult to know,’ ” he said.

“I think many of us rely heavily on what we see in the trials, particularly when they make it to the top journals, and quite frankly, we generally take it at face value,” Dr. Addison observed.
 

Lower Rate of Reported Events

The investigators reviewed CV events reported in 97,365 patients (median age, 61 years; 46% female) enrolled in 189 phase 2 and 3 trials supporting FDA approval of 123 anticancer drugs from 1998 to 2018. Biologic, targeted, or immune-based therapies accounted for 72.5% of drug approvals.

Over 148,138 person-years of follow-up (median trial duration, 30 months), there were 1,148 incidents of MACE (375 heart failure, 253 MIs, 180 strokes, 65 atrial fibrillation, 29 coronary revascularizations, and 246 CVD deaths). MACE rates were higher in the intervention group than in the control group (792 vs. 356; P less than .01). Among the 64 trials that excluded patients with baseline CVD, there were 269 incidents of MACE.

To put this finding in context, the researchers examined the reported incidence of MACE among some 6,000 similarly aged participants in the Multi-Ethnic Study of Atherosclerosis (MESA). The overall weighted-average incidence rate was 1,408 per 100,000 person-years among MESA participants, compared with 542 events per 100,000 person-years among oncology trial participants (716 per 100,000 in the intervention arm). This represents a reported-to-expected ratio of 0.38 – a 2.6-fold lower rate of reported events (P less than .001) – and a risk difference of 866.

Further, MACE reporting was lower by a factor of 1.7 among all cancer trial participants irrespective of baseline CVD status (reported-to-expected ratio, 0.56; risk difference, 613; P less than .001).

There was no significant difference in MACE reporting between independent or industry-sponsored trials, the authors report.
 

No malicious intent

“There are likely some that might lean toward not wanting to attribute blame to a new drug when the drug is in a study, but I really think that the leading factor is lack of awareness,” Dr. Addison said. “I’ve talked with several cancer collaborators around the country who run large clinical trials, and I think often, when an event may be brought to someone’s attention, there is a tendency to just write it off as kind of a generic expected event due to age, or just something that’s not really pertinent to the study. So they don’t really focus on it as much.”

“Closer collaboration between cardiologists and cancer physicians is needed to better determine true cardiac risks among patients treated with these drugs.”

Breast cancer oncologist Marc E. Lippman, MD, of Georgetown University Medical Center and Georgetown Lombardi Comprehensive Cancer Center, Washington, D.C., isn’t convinced a lack of awareness is the culprit.

“I don’t agree with that at all,” he said in an interview. “I think there are very, very clear rules and guidelines these days for adverse-event reporting. I think that’s not a very likely explanation – that it’s not on the radar.”

Part of the problem may be that some of the toxicities, particularly cardiovascular, may not emerge for years, he said. Participant screening for the trials also likely removed patients with high cardiovascular risk. “It’s very understandable to me – I’m not saying it’s good particularly – but I think it’s very understandable that, if you’re trying to develop a drug, the last thing you’d want to have is a lot of toxicity that you might have avoided by just being restrictive in who you let into the study,” Dr. Lippman said.

The underreported CVD events may also reflect the rapidly changing profile of cardiovascular toxicities associated with novel anticancer therapies.

“Providers, both cancer and noncancer, generally put cardiotoxicity in the box of anthracyclines and radiation, but particularly over the last decade, we’ve begun to understand it’s well beyond any one class of drugs,” Dr. Addison said.

“I agree completely,” Dr. Lippman said. For example, “the checkpoint inhibitors are so unbelievably different in terms of their toxicities that many people simply didn’t even know what they were getting into at first.”
 

One size does not fit all

Javid Moslehi, MD, director of the cardio-oncology program at Vanderbilt University, Nashville, Tenn., said echocardiography – recommended to detect changes in left ventricular function in patients exposed to anthracyclines or targeted agents like trastuzumab (Herceptin) – isn’t enough to address today’s cancer therapy–related CVD events.

Courtesy Joe Howell

“Initial drugs like anthracyclines or Herceptin in cardio-oncology were associated with systolic cardiac dysfunction, whereas the majority of issues we see in the cardio-oncology clinics today are vascular, metabolic, arrhythmogenic, and inflammatory,” he said in an interview. “Echocardiography misses the big and increasingly complex picture.”

His group, for example, has been studying myocarditis associated with immunotherapies, but none of the clinical trials require screening or surveillance for myocarditis with a cardiac biomarker like troponin.

The group also recently identified 303 deaths in patients exposed to ibrutinib, a drug that revolutionized the treatment of several B-cell malignancies but is associated with higher rates of atrial fibrillation, which is also associated with increased bleeding risk. “So there’s a little bit of a double whammy there, given that we often treat atrial fibrillation with anticoagulation and where we can cause complications in patients,” Dr. Moslehi noted.

Although there needs to be closer collaboration between cardiologists and oncologists on individual trials, cardiologists also have to realize that oncology care has become very personalized, he suggested.

“What’s probably relevant for the breast cancer patient may not be relevant for the prostate cancer patient and their respective treatments,” Dr. Moslehi said. “So if we were to say, ‘every person should get an echo,’ that may be less relevant to the prostate cancer patient where treatments can cause vascular and metabolic perturbations or to the patient treated with immunotherapy who may have myocarditis, where many of the echos can be normal. There’s no one-size-fits-all for these things.”

Wearable technologies like smartwatches could play a role in improving the reporting of CVD events with novel therapies but a lot more research needs to be done to validate these tools, Dr. Addison said. “But as we continue on into the 21st century, this is going to expand and may potentially help us,” he added.

In the interim, better standardization is needed of the cardiovascular events reported in oncology trials, particularly the Common Terminology Criteria for Adverse Events (CTCAE), said Dr. Moslehi, who also serves as chair of the American Heart Association’s subcommittee on cardio-oncology.

“Cardiovascular definitions are not exactly uniform and are not consistent with what we in cardiology consider to be important or relevant,” he said. “So I think there needs to be better standardization of these definitions, specifically within the CTCAE, which is what the oncologists use to identify adverse events.”

In a linked editorial (J Am Coll Cardiol. 2020;75:629-31), Dr. Lippman and cardiologist Nanette Bishopric, MD, of the Medstar Heart and Vascular Institute in Washington, D.C., suggested it may also be time to organize a consortium that can carry out “rigorous multicenter clinical investigations to evaluate the cardiotoxicity of emerging cancer treatments,” similar to the Thrombosis in Myocardial Infarction Study Group.

“The success of this consortium in pioneering and targeting multiple generations of drugs for the treatment of MI, involving tens of thousands of patients and thousands of collaborations across multiple national borders, is a model for how to move forward in providing the new hope of cancer cure without the trade-off of years lost to heart disease,” the editorialists concluded.

The study was supported in part by National Institutes of Health grants, including a K12-CA133250 grant to Dr. Addison. Dr. Bishopric reported being on the scientific board of C&C Biopharma. Dr. Lippman reports being on the board of directors of and holding stock in Seattle Genetics. Dr. Moslehi reported having served on advisory boards for Pfizer, Novartis, Bristol-Myers Squibb, Deciphera, Audentes Pharmaceuticals, Nektar, Takeda, Ipsen, Myokardia, AstraZeneca, GlaxoSmithKline, Intrexon, and Regeneron.

This article first appeared on Medscape.com.

Clinical trials supporting Food and Drug Adminstration approval of contemporary cancer therapies frequently failed to capture major adverse cardiovascular events (MACE) and, when they did, reported rates 2.6-fold lower than noncancer trials, new research shows.

Overall, 51.3% of trials did not report MACE, with that number reaching 57.6% in trials enrolling patients with baseline cardiovascular disease (CVD).

Nearly 40% of trials did not report any CVD events in follow-up, the authors reported online Feb. 10, 2020, in the Journal of the American College of Cardiology (2020;75:620-8).

“Even in drug classes where there were established or emerging associations with cardiotoxic events, often there were no reported heart events or cardiovascular events across years of follow-up in trials that examined hundreds or even thousands of patients. That was actually pretty surprising,” senior author Daniel Addison, MD, codirector of the cardio-oncology program at the Ohio State University Medical Center, Columbus, said in an interview.

The study was prompted by a series of events that crescendoed when his team was called to the ICU to determine whether a novel targeted agent played a role in the heart decline of a patient with acute myeloid leukemia. “I had a resident ask me a very important question: ‘How do we really know for sure that the trial actually reflects the true risk of heart events?’ to which I told him, ‘it’s difficult to know,’ ” he said.

“I think many of us rely heavily on what we see in the trials, particularly when they make it to the top journals, and quite frankly, we generally take it at face value,” Dr. Addison observed.
 

Lower Rate of Reported Events

The investigators reviewed CV events reported in 97,365 patients (median age, 61 years; 46% female) enrolled in 189 phase 2 and 3 trials supporting FDA approval of 123 anticancer drugs from 1998 to 2018. Biologic, targeted, or immune-based therapies accounted for 72.5% of drug approvals.

Over 148,138 person-years of follow-up (median trial duration, 30 months), there were 1,148 incidents of MACE (375 heart failure, 253 MIs, 180 strokes, 65 atrial fibrillation, 29 coronary revascularizations, and 246 CVD deaths). MACE rates were higher in the intervention group than in the control group (792 vs. 356; P less than .01). Among the 64 trials that excluded patients with baseline CVD, there were 269 incidents of MACE.

To put this finding in context, the researchers examined the reported incidence of MACE among some 6,000 similarly aged participants in the Multi-Ethnic Study of Atherosclerosis (MESA). The overall weighted-average incidence rate was 1,408 per 100,000 person-years among MESA participants, compared with 542 events per 100,000 person-years among oncology trial participants (716 per 100,000 in the intervention arm). This represents a reported-to-expected ratio of 0.38 – a 2.6-fold lower rate of reported events (P less than .001) – and a risk difference of 866.

Further, MACE reporting was lower by a factor of 1.7 among all cancer trial participants irrespective of baseline CVD status (reported-to-expected ratio, 0.56; risk difference, 613; P less than .001).

There was no significant difference in MACE reporting between independent or industry-sponsored trials, the authors report.
 

No malicious intent

“There are likely some that might lean toward not wanting to attribute blame to a new drug when the drug is in a study, but I really think that the leading factor is lack of awareness,” Dr. Addison said. “I’ve talked with several cancer collaborators around the country who run large clinical trials, and I think often, when an event may be brought to someone’s attention, there is a tendency to just write it off as kind of a generic expected event due to age, or just something that’s not really pertinent to the study. So they don’t really focus on it as much.”

“Closer collaboration between cardiologists and cancer physicians is needed to better determine true cardiac risks among patients treated with these drugs.”

Breast cancer oncologist Marc E. Lippman, MD, of Georgetown University Medical Center and Georgetown Lombardi Comprehensive Cancer Center, Washington, D.C., isn’t convinced a lack of awareness is the culprit.

“I don’t agree with that at all,” he said in an interview. “I think there are very, very clear rules and guidelines these days for adverse-event reporting. I think that’s not a very likely explanation – that it’s not on the radar.”

Part of the problem may be that some of the toxicities, particularly cardiovascular, may not emerge for years, he said. Participant screening for the trials also likely removed patients with high cardiovascular risk. “It’s very understandable to me – I’m not saying it’s good particularly – but I think it’s very understandable that, if you’re trying to develop a drug, the last thing you’d want to have is a lot of toxicity that you might have avoided by just being restrictive in who you let into the study,” Dr. Lippman said.

The underreported CVD events may also reflect the rapidly changing profile of cardiovascular toxicities associated with novel anticancer therapies.

“Providers, both cancer and noncancer, generally put cardiotoxicity in the box of anthracyclines and radiation, but particularly over the last decade, we’ve begun to understand it’s well beyond any one class of drugs,” Dr. Addison said.

“I agree completely,” Dr. Lippman said. For example, “the checkpoint inhibitors are so unbelievably different in terms of their toxicities that many people simply didn’t even know what they were getting into at first.”
 

One size does not fit all

Javid Moslehi, MD, director of the cardio-oncology program at Vanderbilt University, Nashville, Tenn., said echocardiography – recommended to detect changes in left ventricular function in patients exposed to anthracyclines or targeted agents like trastuzumab (Herceptin) – isn’t enough to address today’s cancer therapy–related CVD events.

Courtesy Joe Howell

“Initial drugs like anthracyclines or Herceptin in cardio-oncology were associated with systolic cardiac dysfunction, whereas the majority of issues we see in the cardio-oncology clinics today are vascular, metabolic, arrhythmogenic, and inflammatory,” he said in an interview. “Echocardiography misses the big and increasingly complex picture.”

His group, for example, has been studying myocarditis associated with immunotherapies, but none of the clinical trials require screening or surveillance for myocarditis with a cardiac biomarker like troponin.

The group also recently identified 303 deaths in patients exposed to ibrutinib, a drug that revolutionized the treatment of several B-cell malignancies but is associated with higher rates of atrial fibrillation, which is also associated with increased bleeding risk. “So there’s a little bit of a double whammy there, given that we often treat atrial fibrillation with anticoagulation and where we can cause complications in patients,” Dr. Moslehi noted.

Although there needs to be closer collaboration between cardiologists and oncologists on individual trials, cardiologists also have to realize that oncology care has become very personalized, he suggested.

“What’s probably relevant for the breast cancer patient may not be relevant for the prostate cancer patient and their respective treatments,” Dr. Moslehi said. “So if we were to say, ‘every person should get an echo,’ that may be less relevant to the prostate cancer patient where treatments can cause vascular and metabolic perturbations or to the patient treated with immunotherapy who may have myocarditis, where many of the echos can be normal. There’s no one-size-fits-all for these things.”

Wearable technologies like smartwatches could play a role in improving the reporting of CVD events with novel therapies but a lot more research needs to be done to validate these tools, Dr. Addison said. “But as we continue on into the 21st century, this is going to expand and may potentially help us,” he added.

In the interim, better standardization is needed of the cardiovascular events reported in oncology trials, particularly the Common Terminology Criteria for Adverse Events (CTCAE), said Dr. Moslehi, who also serves as chair of the American Heart Association’s subcommittee on cardio-oncology.

“Cardiovascular definitions are not exactly uniform and are not consistent with what we in cardiology consider to be important or relevant,” he said. “So I think there needs to be better standardization of these definitions, specifically within the CTCAE, which is what the oncologists use to identify adverse events.”

In a linked editorial (J Am Coll Cardiol. 2020;75:629-31), Dr. Lippman and cardiologist Nanette Bishopric, MD, of the Medstar Heart and Vascular Institute in Washington, D.C., suggested it may also be time to organize a consortium that can carry out “rigorous multicenter clinical investigations to evaluate the cardiotoxicity of emerging cancer treatments,” similar to the Thrombosis in Myocardial Infarction Study Group.

“The success of this consortium in pioneering and targeting multiple generations of drugs for the treatment of MI, involving tens of thousands of patients and thousands of collaborations across multiple national borders, is a model for how to move forward in providing the new hope of cancer cure without the trade-off of years lost to heart disease,” the editorialists concluded.

The study was supported in part by National Institutes of Health grants, including a K12-CA133250 grant to Dr. Addison. Dr. Bishopric reported being on the scientific board of C&C Biopharma. Dr. Lippman reports being on the board of directors of and holding stock in Seattle Genetics. Dr. Moslehi reported having served on advisory boards for Pfizer, Novartis, Bristol-Myers Squibb, Deciphera, Audentes Pharmaceuticals, Nektar, Takeda, Ipsen, Myokardia, AstraZeneca, GlaxoSmithKline, Intrexon, and Regeneron.

This article first appeared on Medscape.com.

Clinical trials supporting Food and Drug Adminstration approval of contemporary cancer therapies frequently failed to capture major adverse cardiovascular events (MACE) and, when they did, reported rates 2.6-fold lower than noncancer trials, new research shows.

Overall, 51.3% of trials did not report MACE, with that number reaching 57.6% in trials enrolling patients with baseline cardiovascular disease (CVD).

Nearly 40% of trials did not report any CVD events in follow-up, the authors reported online Feb. 10, 2020, in the Journal of the American College of Cardiology (2020;75:620-8).

“Even in drug classes where there were established or emerging associations with cardiotoxic events, often there were no reported heart events or cardiovascular events across years of follow-up in trials that examined hundreds or even thousands of patients. That was actually pretty surprising,” senior author Daniel Addison, MD, codirector of the cardio-oncology program at the Ohio State University Medical Center, Columbus, said in an interview.

The study was prompted by a series of events that crescendoed when his team was called to the ICU to determine whether a novel targeted agent played a role in the heart decline of a patient with acute myeloid leukemia. “I had a resident ask me a very important question: ‘How do we really know for sure that the trial actually reflects the true risk of heart events?’ to which I told him, ‘it’s difficult to know,’ ” he said.

“I think many of us rely heavily on what we see in the trials, particularly when they make it to the top journals, and quite frankly, we generally take it at face value,” Dr. Addison observed.
 

Lower Rate of Reported Events

The investigators reviewed CV events reported in 97,365 patients (median age, 61 years; 46% female) enrolled in 189 phase 2 and 3 trials supporting FDA approval of 123 anticancer drugs from 1998 to 2018. Biologic, targeted, or immune-based therapies accounted for 72.5% of drug approvals.

Over 148,138 person-years of follow-up (median trial duration, 30 months), there were 1,148 incidents of MACE (375 heart failure, 253 MIs, 180 strokes, 65 atrial fibrillation, 29 coronary revascularizations, and 246 CVD deaths). MACE rates were higher in the intervention group than in the control group (792 vs. 356; P less than .01). Among the 64 trials that excluded patients with baseline CVD, there were 269 incidents of MACE.

To put this finding in context, the researchers examined the reported incidence of MACE among some 6,000 similarly aged participants in the Multi-Ethnic Study of Atherosclerosis (MESA). The overall weighted-average incidence rate was 1,408 per 100,000 person-years among MESA participants, compared with 542 events per 100,000 person-years among oncology trial participants (716 per 100,000 in the intervention arm). This represents a reported-to-expected ratio of 0.38 – a 2.6-fold lower rate of reported events (P less than .001) – and a risk difference of 866.

Further, MACE reporting was lower by a factor of 1.7 among all cancer trial participants irrespective of baseline CVD status (reported-to-expected ratio, 0.56; risk difference, 613; P less than .001).

There was no significant difference in MACE reporting between independent or industry-sponsored trials, the authors report.
 

No malicious intent

“There are likely some that might lean toward not wanting to attribute blame to a new drug when the drug is in a study, but I really think that the leading factor is lack of awareness,” Dr. Addison said. “I’ve talked with several cancer collaborators around the country who run large clinical trials, and I think often, when an event may be brought to someone’s attention, there is a tendency to just write it off as kind of a generic expected event due to age, or just something that’s not really pertinent to the study. So they don’t really focus on it as much.”

“Closer collaboration between cardiologists and cancer physicians is needed to better determine true cardiac risks among patients treated with these drugs.”

Breast cancer oncologist Marc E. Lippman, MD, of Georgetown University Medical Center and Georgetown Lombardi Comprehensive Cancer Center, Washington, D.C., isn’t convinced a lack of awareness is the culprit.

“I don’t agree with that at all,” he said in an interview. “I think there are very, very clear rules and guidelines these days for adverse-event reporting. I think that’s not a very likely explanation – that it’s not on the radar.”

Part of the problem may be that some of the toxicities, particularly cardiovascular, may not emerge for years, he said. Participant screening for the trials also likely removed patients with high cardiovascular risk. “It’s very understandable to me – I’m not saying it’s good particularly – but I think it’s very understandable that, if you’re trying to develop a drug, the last thing you’d want to have is a lot of toxicity that you might have avoided by just being restrictive in who you let into the study,” Dr. Lippman said.

The underreported CVD events may also reflect the rapidly changing profile of cardiovascular toxicities associated with novel anticancer therapies.

“Providers, both cancer and noncancer, generally put cardiotoxicity in the box of anthracyclines and radiation, but particularly over the last decade, we’ve begun to understand it’s well beyond any one class of drugs,” Dr. Addison said.

“I agree completely,” Dr. Lippman said. For example, “the checkpoint inhibitors are so unbelievably different in terms of their toxicities that many people simply didn’t even know what they were getting into at first.”
 

One size does not fit all

Javid Moslehi, MD, director of the cardio-oncology program at Vanderbilt University, Nashville, Tenn., said echocardiography – recommended to detect changes in left ventricular function in patients exposed to anthracyclines or targeted agents like trastuzumab (Herceptin) – isn’t enough to address today’s cancer therapy–related CVD events.

Courtesy Joe Howell

“Initial drugs like anthracyclines or Herceptin in cardio-oncology were associated with systolic cardiac dysfunction, whereas the majority of issues we see in the cardio-oncology clinics today are vascular, metabolic, arrhythmogenic, and inflammatory,” he said in an interview. “Echocardiography misses the big and increasingly complex picture.”

His group, for example, has been studying myocarditis associated with immunotherapies, but none of the clinical trials require screening or surveillance for myocarditis with a cardiac biomarker like troponin.

The group also recently identified 303 deaths in patients exposed to ibrutinib, a drug that revolutionized the treatment of several B-cell malignancies but is associated with higher rates of atrial fibrillation, which is also associated with increased bleeding risk. “So there’s a little bit of a double whammy there, given that we often treat atrial fibrillation with anticoagulation and where we can cause complications in patients,” Dr. Moslehi noted.

Although there needs to be closer collaboration between cardiologists and oncologists on individual trials, cardiologists also have to realize that oncology care has become very personalized, he suggested.

“What’s probably relevant for the breast cancer patient may not be relevant for the prostate cancer patient and their respective treatments,” Dr. Moslehi said. “So if we were to say, ‘every person should get an echo,’ that may be less relevant to the prostate cancer patient where treatments can cause vascular and metabolic perturbations or to the patient treated with immunotherapy who may have myocarditis, where many of the echos can be normal. There’s no one-size-fits-all for these things.”

Wearable technologies like smartwatches could play a role in improving the reporting of CVD events with novel therapies but a lot more research needs to be done to validate these tools, Dr. Addison said. “But as we continue on into the 21st century, this is going to expand and may potentially help us,” he added.

In the interim, better standardization is needed of the cardiovascular events reported in oncology trials, particularly the Common Terminology Criteria for Adverse Events (CTCAE), said Dr. Moslehi, who also serves as chair of the American Heart Association’s subcommittee on cardio-oncology.

“Cardiovascular definitions are not exactly uniform and are not consistent with what we in cardiology consider to be important or relevant,” he said. “So I think there needs to be better standardization of these definitions, specifically within the CTCAE, which is what the oncologists use to identify adverse events.”

In a linked editorial (J Am Coll Cardiol. 2020;75:629-31), Dr. Lippman and cardiologist Nanette Bishopric, MD, of the Medstar Heart and Vascular Institute in Washington, D.C., suggested it may also be time to organize a consortium that can carry out “rigorous multicenter clinical investigations to evaluate the cardiotoxicity of emerging cancer treatments,” similar to the Thrombosis in Myocardial Infarction Study Group.

“The success of this consortium in pioneering and targeting multiple generations of drugs for the treatment of MI, involving tens of thousands of patients and thousands of collaborations across multiple national borders, is a model for how to move forward in providing the new hope of cancer cure without the trade-off of years lost to heart disease,” the editorialists concluded.

The study was supported in part by National Institutes of Health grants, including a K12-CA133250 grant to Dr. Addison. Dr. Bishopric reported being on the scientific board of C&C Biopharma. Dr. Lippman reports being on the board of directors of and holding stock in Seattle Genetics. Dr. Moslehi reported having served on advisory boards for Pfizer, Novartis, Bristol-Myers Squibb, Deciphera, Audentes Pharmaceuticals, Nektar, Takeda, Ipsen, Myokardia, AstraZeneca, GlaxoSmithKline, Intrexon, and Regeneron.

This article first appeared on Medscape.com.

Among Medicare beneficiaries admitted to the hospital between 2008 and 2016, there was an increase in postdischarge 30-day mortality for patients with heart failure, but not for those with acute myocardial infarction or pneumonia.

The finding comes from an effort to evaluate the use of services soon after discharge for conditions targeted in the U.S. Hospital Readmissions Reduction Program (HRRP), and patients’ outcomes.

“The announcement and implementation of the HRRP were associated with a reduction in readmissions within 30 days of discharge for heart failure, acute myocardial infarction, and pneumonia, as shown by a decrease in the overall national rate of readmissions,” first author Rohan Khera, MD, and colleagues wrote in a study published online Jan. 15, 2020, in the British Medical Journal (doi:10.1136/bmj.l6831).

“Concerns existed that pressures to reduce readmissions had led to the evolution of care patterns that may have adverse consequences through reducing access to care in appropriate settings. Therefore, determining whether patients who are seen in acute care settings, but not admitted to hospital, experience an increased risk of mortality is essential.”

Dr. Khera, a cardiologist at the University of Texas Southwestern Medical Center, Dallas, and colleagues limited the analysis to Medicare claims data from patients who were admitted to the hospital with heart failure, acute myocardial infarction (MI), or pneumonia between 2008 and 2016. Key outcomes of interest were: (1) postdischarge 30-day mortality; and (2) acute care utilization in inpatient units, observation units, and the ED during the postdischarge period.

During the study period there were 3,772,924 hospital admissions for heart failure, 1,570,113 for acute MI, and 3,131,162 for pneumonia. The greatest number of readmissions within 30 days of discharge was for heart failure patients (22.5%), followed by acute MI (17.5%), and pneumonia (17.2%).

The overall rates of observation stays were 1.7% for heart failure, 2.6% for acute MI, and 1.4% for pneumonia, while the overall rates of emergency department visits were 6.4% for heart failure, 6.8% for acute MI, and 6.3% for pneumonia. Cumulatively, about one-third of all admissions – 30.7% for heart failure, 26.9% for acute MI, and 24.8% for pneumonia – received postdischarge care in any acute care setting.

Dr. Khera and colleagues found that overall postdischarge 30-day mortality was 8.7% for heart failure, 7.3% for acute MI, and 8.4% for pneumonia. At the same time, postdischarge 30-day mortality was higher in patients with readmissions (13.2% for heart failure, 12.7% for acute MI, and 15.3% for pneumonia), compared with those who had observation stays (4.5% for heart failure, 2.7% for acute MI, and 4.6% for pneumonia), emergency department visits (9.7% for heart failure, 8.8% for acute MI, and 7.8% for pneumonia), or no postdischarge acute care (7.2% for heart failure, 6.0% for acute MI, and 6.9% for pneumonia). Risk adjusted mortality increased annually by 0.05% only for heart failure, while it decreased by 0.06% for acute MI, and did not significantly change for pneumonia.

“The study strongly suggests that the HRRP did not lead to harm through inappropriate triage of patients at high risk to observation units and the emergency department, and therefore provides evidence against calls to curtail the program owing to this theoretical concern (see JAMA 2018;320:2539-41),” the researchers concluded.

They acknowledged certain limitations of the study, including the fact that they were “unable to identify patterns of acute care during the index hospital admission that would be associated with a higher rate of postdischarge acute care in observation units and emergency departments and whether these visits represented avenues for planned postdischarge follow-up care. Moreover, the proportion of these care encounters that were preventable remains poorly understood.”

Dr. Khera disclosed that he is supported by the National Center for Advancing Translational Sciences of the National Institutes of Health. His coauthors reported having numerous disclosures.

dbrunk@mdedge.com

SOURCE: Khera et al. BMJ 2020;368:l6831.

Among Medicare beneficiaries admitted to the hospital between 2008 and 2016, there was an increase in postdischarge 30-day mortality for patients with heart failure, but not for those with acute myocardial infarction or pneumonia.

The finding comes from an effort to evaluate the use of services soon after discharge for conditions targeted in the U.S. Hospital Readmissions Reduction Program (HRRP), and patients’ outcomes.

“The announcement and implementation of the HRRP were associated with a reduction in readmissions within 30 days of discharge for heart failure, acute myocardial infarction, and pneumonia, as shown by a decrease in the overall national rate of readmissions,” first author Rohan Khera, MD, and colleagues wrote in a study published online Jan. 15, 2020, in the British Medical Journal (doi:10.1136/bmj.l6831).

“Concerns existed that pressures to reduce readmissions had led to the evolution of care patterns that may have adverse consequences through reducing access to care in appropriate settings. Therefore, determining whether patients who are seen in acute care settings, but not admitted to hospital, experience an increased risk of mortality is essential.”

Dr. Khera, a cardiologist at the University of Texas Southwestern Medical Center, Dallas, and colleagues limited the analysis to Medicare claims data from patients who were admitted to the hospital with heart failure, acute myocardial infarction (MI), or pneumonia between 2008 and 2016. Key outcomes of interest were: (1) postdischarge 30-day mortality; and (2) acute care utilization in inpatient units, observation units, and the ED during the postdischarge period.

During the study period there were 3,772,924 hospital admissions for heart failure, 1,570,113 for acute MI, and 3,131,162 for pneumonia. The greatest number of readmissions within 30 days of discharge was for heart failure patients (22.5%), followed by acute MI (17.5%), and pneumonia (17.2%).

The overall rates of observation stays were 1.7% for heart failure, 2.6% for acute MI, and 1.4% for pneumonia, while the overall rates of emergency department visits were 6.4% for heart failure, 6.8% for acute MI, and 6.3% for pneumonia. Cumulatively, about one-third of all admissions – 30.7% for heart failure, 26.9% for acute MI, and 24.8% for pneumonia – received postdischarge care in any acute care setting.

Dr. Khera and colleagues found that overall postdischarge 30-day mortality was 8.7% for heart failure, 7.3% for acute MI, and 8.4% for pneumonia. At the same time, postdischarge 30-day mortality was higher in patients with readmissions (13.2% for heart failure, 12.7% for acute MI, and 15.3% for pneumonia), compared with those who had observation stays (4.5% for heart failure, 2.7% for acute MI, and 4.6% for pneumonia), emergency department visits (9.7% for heart failure, 8.8% for acute MI, and 7.8% for pneumonia), or no postdischarge acute care (7.2% for heart failure, 6.0% for acute MI, and 6.9% for pneumonia). Risk adjusted mortality increased annually by 0.05% only for heart failure, while it decreased by 0.06% for acute MI, and did not significantly change for pneumonia.

“The study strongly suggests that the HRRP did not lead to harm through inappropriate triage of patients at high risk to observation units and the emergency department, and therefore provides evidence against calls to curtail the program owing to this theoretical concern (see JAMA 2018;320:2539-41),” the researchers concluded.

They acknowledged certain limitations of the study, including the fact that they were “unable to identify patterns of acute care during the index hospital admission that would be associated with a higher rate of postdischarge acute care in observation units and emergency departments and whether these visits represented avenues for planned postdischarge follow-up care. Moreover, the proportion of these care encounters that were preventable remains poorly understood.”

Dr. Khera disclosed that he is supported by the National Center for Advancing Translational Sciences of the National Institutes of Health. His coauthors reported having numerous disclosures.

dbrunk@mdedge.com

SOURCE: Khera et al. BMJ 2020;368:l6831.

Among Medicare beneficiaries admitted to the hospital between 2008 and 2016, there was an increase in postdischarge 30-day mortality for patients with heart failure, but not for those with acute myocardial infarction or pneumonia.

The finding comes from an effort to evaluate the use of services soon after discharge for conditions targeted in the U.S. Hospital Readmissions Reduction Program (HRRP), and patients’ outcomes.

“The announcement and implementation of the HRRP were associated with a reduction in readmissions within 30 days of discharge for heart failure, acute myocardial infarction, and pneumonia, as shown by a decrease in the overall national rate of readmissions,” first author Rohan Khera, MD, and colleagues wrote in a study published online Jan. 15, 2020, in the British Medical Journal (doi:10.1136/bmj.l6831).

“Concerns existed that pressures to reduce readmissions had led to the evolution of care patterns that may have adverse consequences through reducing access to care in appropriate settings. Therefore, determining whether patients who are seen in acute care settings, but not admitted to hospital, experience an increased risk of mortality is essential.”

Dr. Khera, a cardiologist at the University of Texas Southwestern Medical Center, Dallas, and colleagues limited the analysis to Medicare claims data from patients who were admitted to the hospital with heart failure, acute myocardial infarction (MI), or pneumonia between 2008 and 2016. Key outcomes of interest were: (1) postdischarge 30-day mortality; and (2) acute care utilization in inpatient units, observation units, and the ED during the postdischarge period.

During the study period there were 3,772,924 hospital admissions for heart failure, 1,570,113 for acute MI, and 3,131,162 for pneumonia. The greatest number of readmissions within 30 days of discharge was for heart failure patients (22.5%), followed by acute MI (17.5%), and pneumonia (17.2%).

The overall rates of observation stays were 1.7% for heart failure, 2.6% for acute MI, and 1.4% for pneumonia, while the overall rates of emergency department visits were 6.4% for heart failure, 6.8% for acute MI, and 6.3% for pneumonia. Cumulatively, about one-third of all admissions – 30.7% for heart failure, 26.9% for acute MI, and 24.8% for pneumonia – received postdischarge care in any acute care setting.

Dr. Khera and colleagues found that overall postdischarge 30-day mortality was 8.7% for heart failure, 7.3% for acute MI, and 8.4% for pneumonia. At the same time, postdischarge 30-day mortality was higher in patients with readmissions (13.2% for heart failure, 12.7% for acute MI, and 15.3% for pneumonia), compared with those who had observation stays (4.5% for heart failure, 2.7% for acute MI, and 4.6% for pneumonia), emergency department visits (9.7% for heart failure, 8.8% for acute MI, and 7.8% for pneumonia), or no postdischarge acute care (7.2% for heart failure, 6.0% for acute MI, and 6.9% for pneumonia). Risk adjusted mortality increased annually by 0.05% only for heart failure, while it decreased by 0.06% for acute MI, and did not significantly change for pneumonia.

“The study strongly suggests that the HRRP did not lead to harm through inappropriate triage of patients at high risk to observation units and the emergency department, and therefore provides evidence against calls to curtail the program owing to this theoretical concern (see JAMA 2018;320:2539-41),” the researchers concluded.

They acknowledged certain limitations of the study, including the fact that they were “unable to identify patterns of acute care during the index hospital admission that would be associated with a higher rate of postdischarge acute care in observation units and emergency departments and whether these visits represented avenues for planned postdischarge follow-up care. Moreover, the proportion of these care encounters that were preventable remains poorly understood.”

Dr. Khera disclosed that he is supported by the National Center for Advancing Translational Sciences of the National Institutes of Health. His coauthors reported having numerous disclosures.

dbrunk@mdedge.com

SOURCE: Khera et al. BMJ 2020;368:l6831.

NATIONAL HARBOR, MD. – Testing to identify mutations in the gene that codes for the muscle protein titin is now a reasonable step in routine clinical practice for selected people with either early-onset atrial fibrillation (AFib) or a family history of atrial fibrillation, or other cardiac disorders that have been strongly linked with titin-gene mutations, Patrick T. Ellinor, MD, said at the annual International AF Symposium.

Mitchel L. Zolerr/MDedge News

About one out of every 250 people carries a loss of function (LOF) mutation in one of their TTN genes that codes for the titin protein, making these mutations about as common as mutations for familial hypercholesterolemia, noted Dr. Ellinor, professor of medicine at Harvard Medical School in Boston and director of the Cardiovascular Disease Initiative at the Broad Institute in Cambridge, Mass. TTN LOF mutations are “bad and very frequent,” he said in an interview. “This is evolving quickly as we start to appreciate how frequent these mutations are.”

Several commercial genetic testing companies now offer testing of blood specimens for TTN LOF mutations, often as part of an “arrhythmia test” panel, with a turnaround time of about 4 weeks at a cost to the patient of about $100, noted Dr. Ellinor, who said that he has begun to discuss such testing with a small number of patients in his practice. “It’s reasonable for selected people; the jury is still out on which ones,” a subject that guideline writers will soon need to address, he said.

Patients already diagnosed with early-onset atrial fibrillation (AFib) could benefit from knowing if they had a TTN LOF mutation because that diagnosis would warrant a magnetic resonance scan to look for “subtle myopathies” not detectable with echocardiography, Dr. Ellinor explained. Identification of a TTN LOF would also be a reason to then test the patient’s children. “Perhaps we should offer testing to everyone 40 years old or younger with AFib,” Dr. Ellinor suggested. Many of these patients are now getting genetic testing for TTN on their own “whether or not their physician wants it done,” he noted.

The most recent, and perhaps most persuasive evidence for the link between TTN LOF mutations and AFib came from a recent report from Dr. Ellinor and associates that examined genome-wide associations in 1,546 people with AFib and 41,593 controls using information contained in the UK Biobank, which holds complete gene sequencing data for about half a million U.K. residents (Circ Res. 2020 Jan 17;126[2]: 200-9). The results showed that just under 0.5% of the entire population carried a TTN LOF mutation, and among patients with AFib the prevalence of a TTN LOF mutation was about 2%, but among people who carry this type of mutation 14% were diagnosed with AFib. This penetrance of 14% for AFib among people with a TTN LOF mutation makes AFib the most frequent clinical consequence identified so far for people with this type of mutation. Other cardiac disorders linked with TTN LOF mutations include heart failure and nonischemic cardiomyopathy. The Biobank study findings showed a penetrance for heart failure of about 7% among those with a TTN LOF mutation, and a penetrance of these mutations for nonischemic cardiomyopathy of about 3%.

Dr. Ellinor cited three other recently published studies with consistent results documenting a strong link between TTN LOF mutations and AFib: a study he worked on with lead author Seung H. Choi, Ph.D., and associates that ran an analysis on 2,781 AFib patients and 4,959 controls in a U.S. database of people who underwent whole-genome sequencing (JAMA. 2018 Dec 11; 320[22]:2354-64); a study of 24 Danish families with clusters of three or more affected members with AFib as well as 399 Danish residents with lone, early-onset AFib (Nat Commun. 2018 Oct 17;9[1]:4316); and a study of 25 patients with “very early onset” (less than 45 years old) AFib, which identified four of the 25 patients with a TTN LOF mutation (Circ Genom Precis Med. 2019 Nov 12[11]; 526-8).

Titin is the largest protein in humans and is critical for normal myocardial function. Titin acts as a molecular scaffold for sarcomere assembly and signaling, providing passive stiffness to the sarcomere. Mutations in TTN have been associated with tibial muscular dystrophy, hypertrophic cardiomyopathy, and dilated cardiomyopathy. The relationship now established between TTN mutations and AFib, cardiomyopathy, and heart failure may in the future help explain the tight clinical association of AFib and heart failure, Dr. Ellinor noted. The TTN gene is also notable as the largest gene in the human genome.

Dr. Ellinor has received research funding from Bayer, and he has served as an adviser or consultant to Bayer, Quest Diagnostics, and Novartis.

mzoler@mdedge.com

SOURCE: Choi SH et al. Circ Res. 2020 Jan 17;126[2]: 200-9.

NATIONAL HARBOR, MD. – Testing to identify mutations in the gene that codes for the muscle protein titin is now a reasonable step in routine clinical practice for selected people with either early-onset atrial fibrillation (AFib) or a family history of atrial fibrillation, or other cardiac disorders that have been strongly linked with titin-gene mutations, Patrick T. Ellinor, MD, said at the annual International AF Symposium.

Mitchel L. Zolerr/MDedge News

About one out of every 250 people carries a loss of function (LOF) mutation in one of their TTN genes that codes for the titin protein, making these mutations about as common as mutations for familial hypercholesterolemia, noted Dr. Ellinor, professor of medicine at Harvard Medical School in Boston and director of the Cardiovascular Disease Initiative at the Broad Institute in Cambridge, Mass. TTN LOF mutations are “bad and very frequent,” he said in an interview. “This is evolving quickly as we start to appreciate how frequent these mutations are.”

Several commercial genetic testing companies now offer testing of blood specimens for TTN LOF mutations, often as part of an “arrhythmia test” panel, with a turnaround time of about 4 weeks at a cost to the patient of about $100, noted Dr. Ellinor, who said that he has begun to discuss such testing with a small number of patients in his practice. “It’s reasonable for selected people; the jury is still out on which ones,” a subject that guideline writers will soon need to address, he said.

Patients already diagnosed with early-onset atrial fibrillation (AFib) could benefit from knowing if they had a TTN LOF mutation because that diagnosis would warrant a magnetic resonance scan to look for “subtle myopathies” not detectable with echocardiography, Dr. Ellinor explained. Identification of a TTN LOF would also be a reason to then test the patient’s children. “Perhaps we should offer testing to everyone 40 years old or younger with AFib,” Dr. Ellinor suggested. Many of these patients are now getting genetic testing for TTN on their own “whether or not their physician wants it done,” he noted.

The most recent, and perhaps most persuasive evidence for the link between TTN LOF mutations and AFib came from a recent report from Dr. Ellinor and associates that examined genome-wide associations in 1,546 people with AFib and 41,593 controls using information contained in the UK Biobank, which holds complete gene sequencing data for about half a million U.K. residents (Circ Res. 2020 Jan 17;126[2]: 200-9). The results showed that just under 0.5% of the entire population carried a TTN LOF mutation, and among patients with AFib the prevalence of a TTN LOF mutation was about 2%, but among people who carry this type of mutation 14% were diagnosed with AFib. This penetrance of 14% for AFib among people with a TTN LOF mutation makes AFib the most frequent clinical consequence identified so far for people with this type of mutation. Other cardiac disorders linked with TTN LOF mutations include heart failure and nonischemic cardiomyopathy. The Biobank study findings showed a penetrance for heart failure of about 7% among those with a TTN LOF mutation, and a penetrance of these mutations for nonischemic cardiomyopathy of about 3%.

Dr. Ellinor cited three other recently published studies with consistent results documenting a strong link between TTN LOF mutations and AFib: a study he worked on with lead author Seung H. Choi, Ph.D., and associates that ran an analysis on 2,781 AFib patients and 4,959 controls in a U.S. database of people who underwent whole-genome sequencing (JAMA. 2018 Dec 11; 320[22]:2354-64); a study of 24 Danish families with clusters of three or more affected members with AFib as well as 399 Danish residents with lone, early-onset AFib (Nat Commun. 2018 Oct 17;9[1]:4316); and a study of 25 patients with “very early onset” (less than 45 years old) AFib, which identified four of the 25 patients with a TTN LOF mutation (Circ Genom Precis Med. 2019 Nov 12[11]; 526-8).

Titin is the largest protein in humans and is critical for normal myocardial function. Titin acts as a molecular scaffold for sarcomere assembly and signaling, providing passive stiffness to the sarcomere. Mutations in TTN have been associated with tibial muscular dystrophy, hypertrophic cardiomyopathy, and dilated cardiomyopathy. The relationship now established between TTN mutations and AFib, cardiomyopathy, and heart failure may in the future help explain the tight clinical association of AFib and heart failure, Dr. Ellinor noted. The TTN gene is also notable as the largest gene in the human genome.

Dr. Ellinor has received research funding from Bayer, and he has served as an adviser or consultant to Bayer, Quest Diagnostics, and Novartis.

mzoler@mdedge.com

SOURCE: Choi SH et al. Circ Res. 2020 Jan 17;126[2]: 200-9.

NATIONAL HARBOR, MD. – Testing to identify mutations in the gene that codes for the muscle protein titin is now a reasonable step in routine clinical practice for selected people with either early-onset atrial fibrillation (AFib) or a family history of atrial fibrillation, or other cardiac disorders that have been strongly linked with titin-gene mutations, Patrick T. Ellinor, MD, said at the annual International AF Symposium.

Mitchel L. Zolerr/MDedge News

About one out of every 250 people carries a loss of function (LOF) mutation in one of their TTN genes that codes for the titin protein, making these mutations about as common as mutations for familial hypercholesterolemia, noted Dr. Ellinor, professor of medicine at Harvard Medical School in Boston and director of the Cardiovascular Disease Initiative at the Broad Institute in Cambridge, Mass. TTN LOF mutations are “bad and very frequent,” he said in an interview. “This is evolving quickly as we start to appreciate how frequent these mutations are.”

Several commercial genetic testing companies now offer testing of blood specimens for TTN LOF mutations, often as part of an “arrhythmia test” panel, with a turnaround time of about 4 weeks at a cost to the patient of about $100, noted Dr. Ellinor, who said that he has begun to discuss such testing with a small number of patients in his practice. “It’s reasonable for selected people; the jury is still out on which ones,” a subject that guideline writers will soon need to address, he said.

Patients already diagnosed with early-onset atrial fibrillation (AFib) could benefit from knowing if they had a TTN LOF mutation because that diagnosis would warrant a magnetic resonance scan to look for “subtle myopathies” not detectable with echocardiography, Dr. Ellinor explained. Identification of a TTN LOF would also be a reason to then test the patient’s children. “Perhaps we should offer testing to everyone 40 years old or younger with AFib,” Dr. Ellinor suggested. Many of these patients are now getting genetic testing for TTN on their own “whether or not their physician wants it done,” he noted.

The most recent, and perhaps most persuasive evidence for the link between TTN LOF mutations and AFib came from a recent report from Dr. Ellinor and associates that examined genome-wide associations in 1,546 people with AFib and 41,593 controls using information contained in the UK Biobank, which holds complete gene sequencing data for about half a million U.K. residents (Circ Res. 2020 Jan 17;126[2]: 200-9). The results showed that just under 0.5% of the entire population carried a TTN LOF mutation, and among patients with AFib the prevalence of a TTN LOF mutation was about 2%, but among people who carry this type of mutation 14% were diagnosed with AFib. This penetrance of 14% for AFib among people with a TTN LOF mutation makes AFib the most frequent clinical consequence identified so far for people with this type of mutation. Other cardiac disorders linked with TTN LOF mutations include heart failure and nonischemic cardiomyopathy. The Biobank study findings showed a penetrance for heart failure of about 7% among those with a TTN LOF mutation, and a penetrance of these mutations for nonischemic cardiomyopathy of about 3%.

Dr. Ellinor cited three other recently published studies with consistent results documenting a strong link between TTN LOF mutations and AFib: a study he worked on with lead author Seung H. Choi, Ph.D., and associates that ran an analysis on 2,781 AFib patients and 4,959 controls in a U.S. database of people who underwent whole-genome sequencing (JAMA. 2018 Dec 11; 320[22]:2354-64); a study of 24 Danish families with clusters of three or more affected members with AFib as well as 399 Danish residents with lone, early-onset AFib (Nat Commun. 2018 Oct 17;9[1]:4316); and a study of 25 patients with “very early onset” (less than 45 years old) AFib, which identified four of the 25 patients with a TTN LOF mutation (Circ Genom Precis Med. 2019 Nov 12[11]; 526-8).

Titin is the largest protein in humans and is critical for normal myocardial function. Titin acts as a molecular scaffold for sarcomere assembly and signaling, providing passive stiffness to the sarcomere. Mutations in TTN have been associated with tibial muscular dystrophy, hypertrophic cardiomyopathy, and dilated cardiomyopathy. The relationship now established between TTN mutations and AFib, cardiomyopathy, and heart failure may in the future help explain the tight clinical association of AFib and heart failure, Dr. Ellinor noted. The TTN gene is also notable as the largest gene in the human genome.

Dr. Ellinor has received research funding from Bayer, and he has served as an adviser or consultant to Bayer, Quest Diagnostics, and Novartis.

mzoler@mdedge.com

SOURCE: Choi SH et al. Circ Res. 2020 Jan 17;126[2]: 200-9.

Adult survivors of pediatric cancers appear to be experiencing fewer major cardiac events in adulthood partly because of reduced radiotherapy exposure, especially among survivors of Hodgkin lymphoma, recent research published in BMJ has shown.

“Contemporary cancer treatment has focused on advancing cure rates while attempting to minimize long term adverse effects,” Daniel A. Mulrooney, MD, of the Division of Cancer Survivorship, Department of Oncology, at St. Jude Children’s Research Hospital, Arlington, Va., and colleagues wrote. “Patterns of exposure to cardiotoxic treatment have changed over time, with fewer children receiving chest directed radiation, with lower doses and smaller volumes for those who do, and an increased use of anthracyclines, albeit with reduced cumulative doses as the risk for late-onset heart failure became apparent.”

Although research has been published on improved survival rates of children who underwent cancer treatment in the 1990s, compared with those who received treatment in the 1980s and 1970s, Dr. Mulrooney and colleagues set out to determine whether cardiac outcomes were reduced as well. They conducted a retrospective study of 23,462 5-year survivors of pediatric cancer, which consisted of leukemia, brain cancer, Hodgkin lymphoma, non-Hodgkin lymphoma, renal tumors, neuroblastoma, soft-tissue sarcomas, and bone sarcomas diagnosed between January 1970 and December 1999. Researchers compared the cardiac outcomes of the survivors, including heart failure, coronary artery disease, valvular heart disease, pericardial disease, and arrhythmias, with a comparison group of their siblings (n = 5,057) separated by decade. The adult survivors tended to be women (46% vs. 40%) with a median age of 6.1 years at diagnosis and 27.7 years at final follow-up.

Of the 6,193 participants treated for cancer in the 1970s, the 20-year cumulative incidence of heart failure was 0.69%, while the 9,363 participants treated in the 1980s had an incidence of 0.74%, and 7,906 participants in the 1990s had a cumulative incidence of 0.54% over 20 years. The 20-year cumulative incidence for coronary artery disease (CAD) was 0.38% for participants in the 1970s, 0.24% for participants in the 1980s, and 0.19% for participants in the 1990s (P less than .01). Researchers noted the 20-year cumulative incidence of valvular disease, pericardial disease, and arrhythmias did not decrease between the 1970s and the 1990s.

When comparing the rate of major cardiac events of participants in the 1980s and 1990s with those of the 1970s, CAD diagnoses significantly decreased in the 1980s (hazard ratio, 0.65; 95% confidence interval, 0.45-0.92) and 1990s (HR, 0.53; 95% CI, 0.36-0.77), while there was no significant decrease in heart failure or valvular heart disease risk over time. After adjusting for cardiac radiation, overall risk for CAD was attenuated (HR, 0.90; 0.78-1.05), and Hodgkin lymphoma survivors saw the greatest change between unadjusted (HR, 0.77; 95% CI, 0.66-0.89) and adjusted risk (HR, 0.87; 95% CI, 0.69-1.10) when accounting for cardiac radiation.

“While additional longitudinal follow-up is needed to establish whether similar reductions in the cumulative incidence of heart failure can be confirmed in multivariable analysis, these results suggest that efforts to modify cancer therapies in children and promote health surveillance for survivors are beginning to show benefits not only in overall survival but also in late adverse cardiac effects,” the researchers concluded.

In a related editorial, Mike Hawkins, DPhil, of the Centre for Childhood Cancer Survivor Studies, Institute of Applied Health Research at the University of Birmingham (England), and colleagues said that, while measuring cardiotoxicity is important for this patient population, traditional risk factors with independent associations to cardiac outcomes should also be studied. Guidelines on follow-up for these patients are also needed to inform clinical practice, such as those produced by the International Late Effects of Childhood Cancer Guideline Harmonization Group, they added.

“Survivorship issues are extremely important to patients, their families, and their doctors,” they said. “In two research priority setting initiatives in the United Kingdom, detailed consultation with patients with cancer, survivors, families, friends, and healthcare professionals identified further research into the consequences of cancer as a top priority.”

This study was funded by grants from the National Cancer Institute, Cancer Center Support (CORE) to St. Jude Children’s Research Hospital and American Lebanese Syrian Associated Charities. The authors of the study and the editorial reported no relevant conflicts of interest.

SOURCE: Mulrooney A et al. BMJ. 2020. doi: 10.1136/bmj.l6794.

Adult survivors of pediatric cancers appear to be experiencing fewer major cardiac events in adulthood partly because of reduced radiotherapy exposure, especially among survivors of Hodgkin lymphoma, recent research published in BMJ has shown.

“Contemporary cancer treatment has focused on advancing cure rates while attempting to minimize long term adverse effects,” Daniel A. Mulrooney, MD, of the Division of Cancer Survivorship, Department of Oncology, at St. Jude Children’s Research Hospital, Arlington, Va., and colleagues wrote. “Patterns of exposure to cardiotoxic treatment have changed over time, with fewer children receiving chest directed radiation, with lower doses and smaller volumes for those who do, and an increased use of anthracyclines, albeit with reduced cumulative doses as the risk for late-onset heart failure became apparent.”

Although research has been published on improved survival rates of children who underwent cancer treatment in the 1990s, compared with those who received treatment in the 1980s and 1970s, Dr. Mulrooney and colleagues set out to determine whether cardiac outcomes were reduced as well. They conducted a retrospective study of 23,462 5-year survivors of pediatric cancer, which consisted of leukemia, brain cancer, Hodgkin lymphoma, non-Hodgkin lymphoma, renal tumors, neuroblastoma, soft-tissue sarcomas, and bone sarcomas diagnosed between January 1970 and December 1999. Researchers compared the cardiac outcomes of the survivors, including heart failure, coronary artery disease, valvular heart disease, pericardial disease, and arrhythmias, with a comparison group of their siblings (n = 5,057) separated by decade. The adult survivors tended to be women (46% vs. 40%) with a median age of 6.1 years at diagnosis and 27.7 years at final follow-up.

Of the 6,193 participants treated for cancer in the 1970s, the 20-year cumulative incidence of heart failure was 0.69%, while the 9,363 participants treated in the 1980s had an incidence of 0.74%, and 7,906 participants in the 1990s had a cumulative incidence of 0.54% over 20 years. The 20-year cumulative incidence for coronary artery disease (CAD) was 0.38% for participants in the 1970s, 0.24% for participants in the 1980s, and 0.19% for participants in the 1990s (P less than .01). Researchers noted the 20-year cumulative incidence of valvular disease, pericardial disease, and arrhythmias did not decrease between the 1970s and the 1990s.

When comparing the rate of major cardiac events of participants in the 1980s and 1990s with those of the 1970s, CAD diagnoses significantly decreased in the 1980s (hazard ratio, 0.65; 95% confidence interval, 0.45-0.92) and 1990s (HR, 0.53; 95% CI, 0.36-0.77), while there was no significant decrease in heart failure or valvular heart disease risk over time. After adjusting for cardiac radiation, overall risk for CAD was attenuated (HR, 0.90; 0.78-1.05), and Hodgkin lymphoma survivors saw the greatest change between unadjusted (HR, 0.77; 95% CI, 0.66-0.89) and adjusted risk (HR, 0.87; 95% CI, 0.69-1.10) when accounting for cardiac radiation.

“While additional longitudinal follow-up is needed to establish whether similar reductions in the cumulative incidence of heart failure can be confirmed in multivariable analysis, these results suggest that efforts to modify cancer therapies in children and promote health surveillance for survivors are beginning to show benefits not only in overall survival but also in late adverse cardiac effects,” the researchers concluded.

In a related editorial, Mike Hawkins, DPhil, of the Centre for Childhood Cancer Survivor Studies, Institute of Applied Health Research at the University of Birmingham (England), and colleagues said that, while measuring cardiotoxicity is important for this patient population, traditional risk factors with independent associations to cardiac outcomes should also be studied. Guidelines on follow-up for these patients are also needed to inform clinical practice, such as those produced by the International Late Effects of Childhood Cancer Guideline Harmonization Group, they added.

“Survivorship issues are extremely important to patients, their families, and their doctors,” they said. “In two research priority setting initiatives in the United Kingdom, detailed consultation with patients with cancer, survivors, families, friends, and healthcare professionals identified further research into the consequences of cancer as a top priority.”

This study was funded by grants from the National Cancer Institute, Cancer Center Support (CORE) to St. Jude Children’s Research Hospital and American Lebanese Syrian Associated Charities. The authors of the study and the editorial reported no relevant conflicts of interest.

SOURCE: Mulrooney A et al. BMJ. 2020. doi: 10.1136/bmj.l6794.

Adult survivors of pediatric cancers appear to be experiencing fewer major cardiac events in adulthood partly because of reduced radiotherapy exposure, especially among survivors of Hodgkin lymphoma, recent research published in BMJ has shown.

“Contemporary cancer treatment has focused on advancing cure rates while attempting to minimize long term adverse effects,” Daniel A. Mulrooney, MD, of the Division of Cancer Survivorship, Department of Oncology, at St. Jude Children’s Research Hospital, Arlington, Va., and colleagues wrote. “Patterns of exposure to cardiotoxic treatment have changed over time, with fewer children receiving chest directed radiation, with lower doses and smaller volumes for those who do, and an increased use of anthracyclines, albeit with reduced cumulative doses as the risk for late-onset heart failure became apparent.”

Although research has been published on improved survival rates of children who underwent cancer treatment in the 1990s, compared with those who received treatment in the 1980s and 1970s, Dr. Mulrooney and colleagues set out to determine whether cardiac outcomes were reduced as well. They conducted a retrospective study of 23,462 5-year survivors of pediatric cancer, which consisted of leukemia, brain cancer, Hodgkin lymphoma, non-Hodgkin lymphoma, renal tumors, neuroblastoma, soft-tissue sarcomas, and bone sarcomas diagnosed between January 1970 and December 1999. Researchers compared the cardiac outcomes of the survivors, including heart failure, coronary artery disease, valvular heart disease, pericardial disease, and arrhythmias, with a comparison group of their siblings (n = 5,057) separated by decade. The adult survivors tended to be women (46% vs. 40%) with a median age of 6.1 years at diagnosis and 27.7 years at final follow-up.

Of the 6,193 participants treated for cancer in the 1970s, the 20-year cumulative incidence of heart failure was 0.69%, while the 9,363 participants treated in the 1980s had an incidence of 0.74%, and 7,906 participants in the 1990s had a cumulative incidence of 0.54% over 20 years. The 20-year cumulative incidence for coronary artery disease (CAD) was 0.38% for participants in the 1970s, 0.24% for participants in the 1980s, and 0.19% for participants in the 1990s (P less than .01). Researchers noted the 20-year cumulative incidence of valvular disease, pericardial disease, and arrhythmias did not decrease between the 1970s and the 1990s.

When comparing the rate of major cardiac events of participants in the 1980s and 1990s with those of the 1970s, CAD diagnoses significantly decreased in the 1980s (hazard ratio, 0.65; 95% confidence interval, 0.45-0.92) and 1990s (HR, 0.53; 95% CI, 0.36-0.77), while there was no significant decrease in heart failure or valvular heart disease risk over time. After adjusting for cardiac radiation, overall risk for CAD was attenuated (HR, 0.90; 0.78-1.05), and Hodgkin lymphoma survivors saw the greatest change between unadjusted (HR, 0.77; 95% CI, 0.66-0.89) and adjusted risk (HR, 0.87; 95% CI, 0.69-1.10) when accounting for cardiac radiation.

“While additional longitudinal follow-up is needed to establish whether similar reductions in the cumulative incidence of heart failure can be confirmed in multivariable analysis, these results suggest that efforts to modify cancer therapies in children and promote health surveillance for survivors are beginning to show benefits not only in overall survival but also in late adverse cardiac effects,” the researchers concluded.

In a related editorial, Mike Hawkins, DPhil, of the Centre for Childhood Cancer Survivor Studies, Institute of Applied Health Research at the University of Birmingham (England), and colleagues said that, while measuring cardiotoxicity is important for this patient population, traditional risk factors with independent associations to cardiac outcomes should also be studied. Guidelines on follow-up for these patients are also needed to inform clinical practice, such as those produced by the International Late Effects of Childhood Cancer Guideline Harmonization Group, they added.

“Survivorship issues are extremely important to patients, their families, and their doctors,” they said. “In two research priority setting initiatives in the United Kingdom, detailed consultation with patients with cancer, survivors, families, friends, and healthcare professionals identified further research into the consequences of cancer as a top priority.”

This study was funded by grants from the National Cancer Institute, Cancer Center Support (CORE) to St. Jude Children’s Research Hospital and American Lebanese Syrian Associated Charities. The authors of the study and the editorial reported no relevant conflicts of interest.

SOURCE: Mulrooney A et al. BMJ. 2020. doi: 10.1136/bmj.l6794.

Researchers are recommending routine screening of marijuana use in cardiovascular care settings.

Scott Harms/iStockphoto

A review of current evidence suggests an association between marijuana use and adverse cardiovascular effects, as well as interactions between marijuana and cardiovascular medications.

Although more research is needed, the review authors suggested patients may benefit from marijuana screening and testing as well as discussions about the potential risks of marijuana use in the setting of cardiovascular disease.

Ersilia M. DeFilippis, MD, of Columbia University Irving Medical Center in New York and colleagues conducted this review, which was published in the Journal of the American College of Cardiology.

The authors noted that research on marijuana use and cardiovascular disease is limited. The different forms of cannabis and various routes of administration have made it difficult to draw concrete conclusions about marijuana products. Additionally, there have been no randomized, controlled trials of marijuana products in the United States because such trials are illegal; however, there are observational studies linking marijuana use and adverse cardiovascular effects.

Snapshot of available evidence

One study showed that smoking marijuana produces many of the same cardiotoxic chemicals produced by smoking tobacco (BMJ. 2003 May 3;326[7396]:942-3). Another study suggested marijuana smokers may have greater exposure to harmful chemicals (J Psychoactive Drugs. 1988 Jan-Mar;20[1]:43-6).

More specifically, a meta-analysis suggested that smoking marijuana was one of the top three triggers of myocardial infarction (Lancet. 2011 Feb 26;377[9767]:732-40). And in a systematic analysis, 28 of 33 studies linked marijuana use to an increased risk of acute coronary syndromes (Clin Toxicol [Phila]. 2019 Oct;57[10]:831-41).

Furthermore, a study of 2.5 million marijuana users showed that 3% experienced arrhythmias (Int J Cardiol. 2018 Aug 1;264:91-2). A population survey showed that people who smoked marijuana in the past year experienced a 3.3-fold higher rate of cerebrovascular events (Aust N Z J Public Health. 2016 Jun;40[3]:226-30).

Studies have also indicated that cannabinoids can affect cardiovascular medications, including antiarrhythmics, calcium-channel blockers, isosorbide dinitrate/mononitrate, statins, beta-blockers, warfarin, theophylline, and nonsteroidal anti-inflammatory drugs (Medicines [Basel]. 2018 Dec 23;6[1] pii: E3; Curr Top Behav Neurosci. 2017;32:249-62; Pharmacogenet Genomics. 2009 Jul;19[7]:559-62; Ann Pharmacother. 2009 Jul;43[7]:1347-53; Pharmacol Ther. 2019 Sep;201:25-38).

Reviewer recommendations

Cardiovascular specialists should be informed about regulations governing marijuana products, as well as “potential health consequences of marijuana and its derivatives,” according to Dr. DeFilippis and colleagues.

The authors recommend routinely screening patients for marijuana use, perhaps using the Daily Sessions, Frequency, Age of Onset, and Quantity of Cannabis Use Inventory (PLoS One. 2017 May 26;12[5]:e0178194) or the Cannabis Abuse Screening Test (Int J Methods Psychiatr Res. 2018 Jun;27[2]:e1597).

The authors say urine toxicology “may be reasonable” for patients with myocardial infarction or new-onset heart failure. Such testing is required for patients undergoing a heart transplant because marijuana use may affect their candidacy.

Dr. DeFilippis and colleagues say cardiovascular specialists should inform patients about the risks associated with marijuana use. The authors recommend shared decision making for patients who use marijuana for symptom management or palliative purposes.

Three review authors disclosed relationships with many different pharmaceutical companies. One author disclosed relationships with Medscape Cardiology and WebMD, which are owned by the same parent company as MDedge.
 

jensmith@mdedge.com

SOURCE: J Am Coll Cardiol. 2020 Jan 20. doi: 10.1016/j.jacc.2019.11.025.

Researchers are recommending routine screening of marijuana use in cardiovascular care settings.

Scott Harms/iStockphoto

A review of current evidence suggests an association between marijuana use and adverse cardiovascular effects, as well as interactions between marijuana and cardiovascular medications.

Although more research is needed, the review authors suggested patients may benefit from marijuana screening and testing as well as discussions about the potential risks of marijuana use in the setting of cardiovascular disease.

Ersilia M. DeFilippis, MD, of Columbia University Irving Medical Center in New York and colleagues conducted this review, which was published in the Journal of the American College of Cardiology.

The authors noted that research on marijuana use and cardiovascular disease is limited. The different forms of cannabis and various routes of administration have made it difficult to draw concrete conclusions about marijuana products. Additionally, there have been no randomized, controlled trials of marijuana products in the United States because such trials are illegal; however, there are observational studies linking marijuana use and adverse cardiovascular effects.

Snapshot of available evidence

One study showed that smoking marijuana produces many of the same cardiotoxic chemicals produced by smoking tobacco (BMJ. 2003 May 3;326[7396]:942-3). Another study suggested marijuana smokers may have greater exposure to harmful chemicals (J Psychoactive Drugs. 1988 Jan-Mar;20[1]:43-6).

More specifically, a meta-analysis suggested that smoking marijuana was one of the top three triggers of myocardial infarction (Lancet. 2011 Feb 26;377[9767]:732-40). And in a systematic analysis, 28 of 33 studies linked marijuana use to an increased risk of acute coronary syndromes (Clin Toxicol [Phila]. 2019 Oct;57[10]:831-41).

Furthermore, a study of 2.5 million marijuana users showed that 3% experienced arrhythmias (Int J Cardiol. 2018 Aug 1;264:91-2). A population survey showed that people who smoked marijuana in the past year experienced a 3.3-fold higher rate of cerebrovascular events (Aust N Z J Public Health. 2016 Jun;40[3]:226-30).

Studies have also indicated that cannabinoids can affect cardiovascular medications, including antiarrhythmics, calcium-channel blockers, isosorbide dinitrate/mononitrate, statins, beta-blockers, warfarin, theophylline, and nonsteroidal anti-inflammatory drugs (Medicines [Basel]. 2018 Dec 23;6[1] pii: E3; Curr Top Behav Neurosci. 2017;32:249-62; Pharmacogenet Genomics. 2009 Jul;19[7]:559-62; Ann Pharmacother. 2009 Jul;43[7]:1347-53; Pharmacol Ther. 2019 Sep;201:25-38).

Reviewer recommendations

Cardiovascular specialists should be informed about regulations governing marijuana products, as well as “potential health consequences of marijuana and its derivatives,” according to Dr. DeFilippis and colleagues.

The authors recommend routinely screening patients for marijuana use, perhaps using the Daily Sessions, Frequency, Age of Onset, and Quantity of Cannabis Use Inventory (PLoS One. 2017 May 26;12[5]:e0178194) or the Cannabis Abuse Screening Test (Int J Methods Psychiatr Res. 2018 Jun;27[2]:e1597).

The authors say urine toxicology “may be reasonable” for patients with myocardial infarction or new-onset heart failure. Such testing is required for patients undergoing a heart transplant because marijuana use may affect their candidacy.

Dr. DeFilippis and colleagues say cardiovascular specialists should inform patients about the risks associated with marijuana use. The authors recommend shared decision making for patients who use marijuana for symptom management or palliative purposes.

Three review authors disclosed relationships with many different pharmaceutical companies. One author disclosed relationships with Medscape Cardiology and WebMD, which are owned by the same parent company as MDedge.
 

jensmith@mdedge.com

SOURCE: J Am Coll Cardiol. 2020 Jan 20. doi: 10.1016/j.jacc.2019.11.025.

Researchers are recommending routine screening of marijuana use in cardiovascular care settings.

Scott Harms/iStockphoto

A review of current evidence suggests an association between marijuana use and adverse cardiovascular effects, as well as interactions between marijuana and cardiovascular medications.

Although more research is needed, the review authors suggested patients may benefit from marijuana screening and testing as well as discussions about the potential risks of marijuana use in the setting of cardiovascular disease.

Ersilia M. DeFilippis, MD, of Columbia University Irving Medical Center in New York and colleagues conducted this review, which was published in the Journal of the American College of Cardiology.

The authors noted that research on marijuana use and cardiovascular disease is limited. The different forms of cannabis and various routes of administration have made it difficult to draw concrete conclusions about marijuana products. Additionally, there have been no randomized, controlled trials of marijuana products in the United States because such trials are illegal; however, there are observational studies linking marijuana use and adverse cardiovascular effects.

Snapshot of available evidence

One study showed that smoking marijuana produces many of the same cardiotoxic chemicals produced by smoking tobacco (BMJ. 2003 May 3;326[7396]:942-3). Another study suggested marijuana smokers may have greater exposure to harmful chemicals (J Psychoactive Drugs. 1988 Jan-Mar;20[1]:43-6).

More specifically, a meta-analysis suggested that smoking marijuana was one of the top three triggers of myocardial infarction (Lancet. 2011 Feb 26;377[9767]:732-40). And in a systematic analysis, 28 of 33 studies linked marijuana use to an increased risk of acute coronary syndromes (Clin Toxicol [Phila]. 2019 Oct;57[10]:831-41).

Furthermore, a study of 2.5 million marijuana users showed that 3% experienced arrhythmias (Int J Cardiol. 2018 Aug 1;264:91-2). A population survey showed that people who smoked marijuana in the past year experienced a 3.3-fold higher rate of cerebrovascular events (Aust N Z J Public Health. 2016 Jun;40[3]:226-30).

Studies have also indicated that cannabinoids can affect cardiovascular medications, including antiarrhythmics, calcium-channel blockers, isosorbide dinitrate/mononitrate, statins, beta-blockers, warfarin, theophylline, and nonsteroidal anti-inflammatory drugs (Medicines [Basel]. 2018 Dec 23;6[1] pii: E3; Curr Top Behav Neurosci. 2017;32:249-62; Pharmacogenet Genomics. 2009 Jul;19[7]:559-62; Ann Pharmacother. 2009 Jul;43[7]:1347-53; Pharmacol Ther. 2019 Sep;201:25-38).

Reviewer recommendations

Cardiovascular specialists should be informed about regulations governing marijuana products, as well as “potential health consequences of marijuana and its derivatives,” according to Dr. DeFilippis and colleagues.

The authors recommend routinely screening patients for marijuana use, perhaps using the Daily Sessions, Frequency, Age of Onset, and Quantity of Cannabis Use Inventory (PLoS One. 2017 May 26;12[5]:e0178194) or the Cannabis Abuse Screening Test (Int J Methods Psychiatr Res. 2018 Jun;27[2]:e1597).

The authors say urine toxicology “may be reasonable” for patients with myocardial infarction or new-onset heart failure. Such testing is required for patients undergoing a heart transplant because marijuana use may affect their candidacy.

Dr. DeFilippis and colleagues say cardiovascular specialists should inform patients about the risks associated with marijuana use. The authors recommend shared decision making for patients who use marijuana for symptom management or palliative purposes.

Three review authors disclosed relationships with many different pharmaceutical companies. One author disclosed relationships with Medscape Cardiology and WebMD, which are owned by the same parent company as MDedge.
 

jensmith@mdedge.com

SOURCE: J Am Coll Cardiol. 2020 Jan 20. doi: 10.1016/j.jacc.2019.11.025.

PHILADELPHIA – Testosterone gel for treatment of hypogonadism in older men boosted their left ventricular mass by 3.5% in a single year in the multicenter, double-blind, placebo-controlled Testosterone Cardiovascular Trial, although the clinical implications of this impressive increase remain unclear, Elizabeth Hutchins, MD, reported at the American Heart Association scientific sessions.

Bruce Jancin/MDedge News

“I do think these results should be considered as part of the safety profile for testosterone gel and also represent an interesting and understudied area for future research,” said Dr. Hutchins, a hospitalist affiliated with the Los Angeles Biomedical Research Center at Harbor-UCLA Medical Center.

The Testosterone Cardiovascular Trial was one of seven coordinated placebo-controlled, double-blind clinical trials of the impact of raising serum testosterone levels in older men with low testosterone. Some results of what are known as the TTrials have previously been reported (Endocr Rev. 2018 Jun 1;39[3]:369-86).

Dr. Hutchins presented new findings on the effect of treatment with 1% topical testosterone gel on body surface area–indexed left ventricular mass. The trial utilized a widely prescribed, commercially available product known as AndroGel. The study included 123 men over age 65 with low serum testosterone and coronary CT angiography images obtained at baseline and again after 1 year of double-blind testosterone gel or placebo. More than 80% of the men were above age 75, half were obese, more than two-thirds had hypertension, and 30% had diabetes.

The men initially applied 5 g of the testosterone gel daily, providing 15 mg/day of testosterone, with subsequent dosing adjustments as needed based on serum testosterone levels measured at a central laboratory. Participants were evaluated in office visits with serum testosterone measurements every 3 months. Testosterone levels in the men assigned to active treatment quickly rose to normal range and stayed there for the full 12 months, while the placebo-treated controls continued to have below-normal testosterone throughout the trial.

The key study finding was that LV mass indexed to body surface area rose significantly in the testosterone gel group, from an average of 71.5 g/m² at baseline to 74.8 g/m² at 1 year. That’s a statistically significant 3.5% increase. In contrast, LV mass remained flat across the year in controls: 73.8 g/m² at baseline and 73.3 g/m² at 12 months.

There was, however, no change over time in left or right atrial or ventricular chamber volumes in the testosterone gel recipients, nor in the controls.

Session comoderator Eric D. Peterson, MD, professor of medicine and a cardiologist at Duke University in Durham, N.C., said that “this is a very important topic,” then posed a provocative question to Dr. Hutchins: “If the intervention had been running instead of testosterone gel, would the results have looked similar, and would you be concluding that there should be a warning around the use of running?”

Dr. Hutchins replied that she’s given that question much thought.

“Of course, exercise leads to LV hypertrophy and we consider that to be good muscle, and high blood pressure leads to LV hypertrophy and we consider that bad muscle. So which one is it in this case? From what I can find in the literature, it seems that incremental increases in LV mass in the absence of being an athlete are deleterious. But I think we would need outcomes-based research to really answer that question,” she said.

Dr. Hutchins noted that this was the first-ever randomized controlled trial to measure the effect of testosterone therapy on LV mass in humans. The documented increase achieved with 1 year of testosterone gel doesn’t come close to reaching the threshold of LV hypertrophy, which is about 125 g/m² for men. But evidence from animal and observational human studies suggests that even in the absence of LV hypertrophy, increases in LV mass are associated with increased mortality, she added.

She reported having no financial conflicts regarding her study, sponsored by the National Institutes of Health.

bjancin@mdedge.com

SOURCE: Hutchins E. AHA 2019, Session FS.AOS.04.

PHILADELPHIA – Testosterone gel for treatment of hypogonadism in older men boosted their left ventricular mass by 3.5% in a single year in the multicenter, double-blind, placebo-controlled Testosterone Cardiovascular Trial, although the clinical implications of this impressive increase remain unclear, Elizabeth Hutchins, MD, reported at the American Heart Association scientific sessions.

Bruce Jancin/MDedge News

“I do think these results should be considered as part of the safety profile for testosterone gel and also represent an interesting and understudied area for future research,” said Dr. Hutchins, a hospitalist affiliated with the Los Angeles Biomedical Research Center at Harbor-UCLA Medical Center.

The Testosterone Cardiovascular Trial was one of seven coordinated placebo-controlled, double-blind clinical trials of the impact of raising serum testosterone levels in older men with low testosterone. Some results of what are known as the TTrials have previously been reported (Endocr Rev. 2018 Jun 1;39[3]:369-86).

Dr. Hutchins presented new findings on the effect of treatment with 1% topical testosterone gel on body surface area–indexed left ventricular mass. The trial utilized a widely prescribed, commercially available product known as AndroGel. The study included 123 men over age 65 with low serum testosterone and coronary CT angiography images obtained at baseline and again after 1 year of double-blind testosterone gel or placebo. More than 80% of the men were above age 75, half were obese, more than two-thirds had hypertension, and 30% had diabetes.

The men initially applied 5 g of the testosterone gel daily, providing 15 mg/day of testosterone, with subsequent dosing adjustments as needed based on serum testosterone levels measured at a central laboratory. Participants were evaluated in office visits with serum testosterone measurements every 3 months. Testosterone levels in the men assigned to active treatment quickly rose to normal range and stayed there for the full 12 months, while the placebo-treated controls continued to have below-normal testosterone throughout the trial.

The key study finding was that LV mass indexed to body surface area rose significantly in the testosterone gel group, from an average of 71.5 g/m² at baseline to 74.8 g/m² at 1 year. That’s a statistically significant 3.5% increase. In contrast, LV mass remained flat across the year in controls: 73.8 g/m² at baseline and 73.3 g/m² at 12 months.

There was, however, no change over time in left or right atrial or ventricular chamber volumes in the testosterone gel recipients, nor in the controls.

Session comoderator Eric D. Peterson, MD, professor of medicine and a cardiologist at Duke University in Durham, N.C., said that “this is a very important topic,” then posed a provocative question to Dr. Hutchins: “If the intervention had been running instead of testosterone gel, would the results have looked similar, and would you be concluding that there should be a warning around the use of running?”

Dr. Hutchins replied that she’s given that question much thought.

“Of course, exercise leads to LV hypertrophy and we consider that to be good muscle, and high blood pressure leads to LV hypertrophy and we consider that bad muscle. So which one is it in this case? From what I can find in the literature, it seems that incremental increases in LV mass in the absence of being an athlete are deleterious. But I think we would need outcomes-based research to really answer that question,” she said.

Dr. Hutchins noted that this was the first-ever randomized controlled trial to measure the effect of testosterone therapy on LV mass in humans. The documented increase achieved with 1 year of testosterone gel doesn’t come close to reaching the threshold of LV hypertrophy, which is about 125 g/m² for men. But evidence from animal and observational human studies suggests that even in the absence of LV hypertrophy, increases in LV mass are associated with increased mortality, she added.

She reported having no financial conflicts regarding her study, sponsored by the National Institutes of Health.

bjancin@mdedge.com

SOURCE: Hutchins E. AHA 2019, Session FS.AOS.04.

PHILADELPHIA – Testosterone gel for treatment of hypogonadism in older men boosted their left ventricular mass by 3.5% in a single year in the multicenter, double-blind, placebo-controlled Testosterone Cardiovascular Trial, although the clinical implications of this impressive increase remain unclear, Elizabeth Hutchins, MD, reported at the American Heart Association scientific sessions.

Bruce Jancin/MDedge News

“I do think these results should be considered as part of the safety profile for testosterone gel and also represent an interesting and understudied area for future research,” said Dr. Hutchins, a hospitalist affiliated with the Los Angeles Biomedical Research Center at Harbor-UCLA Medical Center.

The Testosterone Cardiovascular Trial was one of seven coordinated placebo-controlled, double-blind clinical trials of the impact of raising serum testosterone levels in older men with low testosterone. Some results of what are known as the TTrials have previously been reported (Endocr Rev. 2018 Jun 1;39[3]:369-86).

Dr. Hutchins presented new findings on the effect of treatment with 1% topical testosterone gel on body surface area–indexed left ventricular mass. The trial utilized a widely prescribed, commercially available product known as AndroGel. The study included 123 men over age 65 with low serum testosterone and coronary CT angiography images obtained at baseline and again after 1 year of double-blind testosterone gel or placebo. More than 80% of the men were above age 75, half were obese, more than two-thirds had hypertension, and 30% had diabetes.

The men initially applied 5 g of the testosterone gel daily, providing 15 mg/day of testosterone, with subsequent dosing adjustments as needed based on serum testosterone levels measured at a central laboratory. Participants were evaluated in office visits with serum testosterone measurements every 3 months. Testosterone levels in the men assigned to active treatment quickly rose to normal range and stayed there for the full 12 months, while the placebo-treated controls continued to have below-normal testosterone throughout the trial.

The key study finding was that LV mass indexed to body surface area rose significantly in the testosterone gel group, from an average of 71.5 g/m² at baseline to 74.8 g/m² at 1 year. That’s a statistically significant 3.5% increase. In contrast, LV mass remained flat across the year in controls: 73.8 g/m² at baseline and 73.3 g/m² at 12 months.

There was, however, no change over time in left or right atrial or ventricular chamber volumes in the testosterone gel recipients, nor in the controls.

Session comoderator Eric D. Peterson, MD, professor of medicine and a cardiologist at Duke University in Durham, N.C., said that “this is a very important topic,” then posed a provocative question to Dr. Hutchins: “If the intervention had been running instead of testosterone gel, would the results have looked similar, and would you be concluding that there should be a warning around the use of running?”

Dr. Hutchins replied that she’s given that question much thought.

“Of course, exercise leads to LV hypertrophy and we consider that to be good muscle, and high blood pressure leads to LV hypertrophy and we consider that bad muscle. So which one is it in this case? From what I can find in the literature, it seems that incremental increases in LV mass in the absence of being an athlete are deleterious. But I think we would need outcomes-based research to really answer that question,” she said.

Dr. Hutchins noted that this was the first-ever randomized controlled trial to measure the effect of testosterone therapy on LV mass in humans. The documented increase achieved with 1 year of testosterone gel doesn’t come close to reaching the threshold of LV hypertrophy, which is about 125 g/m² for men. But evidence from animal and observational human studies suggests that even in the absence of LV hypertrophy, increases in LV mass are associated with increased mortality, she added.

She reported having no financial conflicts regarding her study, sponsored by the National Institutes of Health.

bjancin@mdedge.com

SOURCE: Hutchins E. AHA 2019, Session FS.AOS.04.

LOS ANGELES – When it comes to the optimal treatment of patients with heart failure with preserved ejection fraction and diabetes, cardiologists like Mark T. Kearney, MB ChB, MD, remain stumped.

Courtesy Dr. Mark T. Kearney

“Over the years, the diagnosis of heart failure with preserved ejection fraction has been notoriously difficult [to treat], controversial, and ultimately involves aggressive catheterization of the heart to assess diastolic dysfunction, complex echocardiography, and invasive tests,” Dr. Kearney said at the World Congress on Insulin Resistance, Diabetes, and Cardiovascular Disease. “These patients have an ejection fraction of over 50% and classic signs and symptoms of heart failure. Studies of beta-blockers, angiotensin-converting enzyme inhibitors, and angiotensin II receptor blockers have been unsuccessful in this group of patients. We’re at the beginning of a journey in understanding this disorder, and it’s important, because more and more patients present to us with signs and symptoms of heart failure with an ejection fraction greater than 50%.”

In a recent analysis of 1,797 patients with chronic heart failure, Dr. Kearney, British Heart Foundation Professor of Cardiovascular and Diabetes Research at the Leeds (England) Institute of Cardiovascular and Metabolic Medicine, and colleagues examined whether beta-blockers and ACE inhibitors were associated with differential effects on mortality in patients with and without diabetes (Diabetes Care. 2018;41:136-42). Mean follow-up was 4 years.

For the ACE inhibitor component of the trial, the researchers correlated the dose of ramipril to outcomes and found that each milligram increase of ramipril reduced the risk of death by about 3%. “In the nondiabetic patients who did not receive an ACE inhibitor, mortality was about 60% – worse than most cancers,” Dr. Kearney said. “In patients with diabetes, there was a similar pattern. If you didn’t get an ACE inhibitor, mortality was 70%. So, if you get patients on an optimal dose of an ACE inhibitor, you improve their mortality substantially, whether they have diabetes or not.”

The beta-blocker component of the trial yielded similar results. Each milligram of bisoprolol reduced the risk of death over a mean of 4 years by about 3% in patients without diabetes and 9% in those with diabetes. “Among patients who did not receive a beta-blocker, the mortality was about 70% at 5 years – really terrible,” he said. “Every milligram of bisoprolol was associated with a reduction in mortality of about 9%. So, if a patient gets on an optimal dose of a beta-blocker and they have diabetes, it’s associated with prolongation of life over a year.”

Dr. Kearney said that patients often do not want to take an increased dose of a beta-blocker because of concerns about side effects, such as tiredness. “They ask me what the side effects of an increased dose would be. My answer is: ‘It will make you live longer.’ Usually, they’ll respond by agreeing to have a little bit more of the beta-blocker. The message here is, if you have a patient with ejection fraction heart failure and diabetes, get them on the optimal dose of a beta-blocker, even at the expense of an ACE inhibitor.”

In 2016, the European Society of Cardiology introduced guidelines for physicians to make a diagnosis of heart failure with preserved ejection fraction. The guidelines mandate that a diagnosis requires signs and symptoms of heart failure, elevated levels of natriuretic peptide, and echocardiographic abnormalities of cardiac structure and/or function in the presence of a left ventricular ejection fraction of 50% or more (Eur J Heart Fail. 2016;18[8]:891-975).

“Signs and symptoms of heart failure, elevated BNP [brain natriuretic peptide], and echocardiography allow us to make a diagnosis of heart failure with preserved ejection fraction,” Dr. Kearney, who is also dean of the Leeds University School of Medicine. “But we don’t know the outcome of these patients, we don’t know how to treat them, and we don’t know the impact on hospitalizations.”

In a large, unpublished cohort study conducted at Leeds, Dr. Kearney and colleagues evaluated how many patients met criteria for heart failure with reduced ejection fraction or heart failure with preserved ejection fraction after undergoing a BNP measurement. Ultimately, 959 patients met criteria. After assessment, 23% had no heart failure, 44% had heart failure with preserved ejection fraction, and 33% had heart failure with reduced ejection fraction. They found that patients with preserved ejection fraction were older (mean age, 84 years); were more likely to be female; and had less ischemia, less diabetes, and more hypertension. In addition, patients with preserved ejection fraction had significantly better survival than patients with reduced ejection fraction over 5 years follow-up.

“What was really interesting were the findings related to hospitalization,” he said. “All 959 patients accounted for 20,517 days in the hospital over 5 years, which is the equivalent of 1 patient occupying a hospital bed for 56 years. This disorder [heart failure with preserved ejection fraction], despite having a lower mortality than heart failure with reduced ejection fraction, leads to a significant burden on health care systems.”

Among patients with preserved ejection fraction, 82% were hospitalized for a noncardiovascular cause, 6.9% because of heart failure, and 11% were caused by other cardiovascular causes. Most of the hospital admissions were because of chest infections, falls, and other frailty-linked causes. “This link between systemic frailty and heart failure with preserved ejection fraction warrants further investigation,” Dr. Kearney said. “This is a major burden on patient hospital care.”

When the researchers examined outcomes in patients with and without diabetes, those with diabetes were younger, more likely to be male, and have a higher body mass index. They found that, in the presence of diabetes, mortality was increased in heart failure with preserved and reduced ejection fraction. “So, even at the age of 81 or 82, diabetes changes the pathophysiology of mortality in what was previously believed to be a benign disease,” he said.

In a subset analysis of patients with and without diabetes who were not taking a beta-blocker, there did not seem to be increased sympathetic activation in the patients with diabetes and heart failure with preserved ejection fraction, nor a difference in heart rate between the nondiabetic patients and patients with diabetes. However, among patients with heart failure with reduced ejection fraction, those with diabetes had an increased heart rate.

“Is heart failure with preserved ejection fraction in diabetes benign? I think the answer is no,” Dr. Kearney said. “It increases hospitalization and is a major burden on health care systems. What should we do? We deal with comorbidity and fall risk. It’s good old-fashioned doctoring, really. We address frailty and respiratory tract infections, but the key thing here is that we need more research.”

Dr. Kearney reported having no relevant financial disclosures.

dbrunk@mdedge.com

LOS ANGELES – When it comes to the optimal treatment of patients with heart failure with preserved ejection fraction and diabetes, cardiologists like Mark T. Kearney, MB ChB, MD, remain stumped.

Courtesy Dr. Mark T. Kearney

“Over the years, the diagnosis of heart failure with preserved ejection fraction has been notoriously difficult [to treat], controversial, and ultimately involves aggressive catheterization of the heart to assess diastolic dysfunction, complex echocardiography, and invasive tests,” Dr. Kearney said at the World Congress on Insulin Resistance, Diabetes, and Cardiovascular Disease. “These patients have an ejection fraction of over 50% and classic signs and symptoms of heart failure. Studies of beta-blockers, angiotensin-converting enzyme inhibitors, and angiotensin II receptor blockers have been unsuccessful in this group of patients. We’re at the beginning of a journey in understanding this disorder, and it’s important, because more and more patients present to us with signs and symptoms of heart failure with an ejection fraction greater than 50%.”

In a recent analysis of 1,797 patients with chronic heart failure, Dr. Kearney, British Heart Foundation Professor of Cardiovascular and Diabetes Research at the Leeds (England) Institute of Cardiovascular and Metabolic Medicine, and colleagues examined whether beta-blockers and ACE inhibitors were associated with differential effects on mortality in patients with and without diabetes (Diabetes Care. 2018;41:136-42). Mean follow-up was 4 years.

For the ACE inhibitor component of the trial, the researchers correlated the dose of ramipril to outcomes and found that each milligram increase of ramipril reduced the risk of death by about 3%. “In the nondiabetic patients who did not receive an ACE inhibitor, mortality was about 60% – worse than most cancers,” Dr. Kearney said. “In patients with diabetes, there was a similar pattern. If you didn’t get an ACE inhibitor, mortality was 70%. So, if you get patients on an optimal dose of an ACE inhibitor, you improve their mortality substantially, whether they have diabetes or not.”

The beta-blocker component of the trial yielded similar results. Each milligram of bisoprolol reduced the risk of death over a mean of 4 years by about 3% in patients without diabetes and 9% in those with diabetes. “Among patients who did not receive a beta-blocker, the mortality was about 70% at 5 years – really terrible,” he said. “Every milligram of bisoprolol was associated with a reduction in mortality of about 9%. So, if a patient gets on an optimal dose of a beta-blocker and they have diabetes, it’s associated with prolongation of life over a year.”

Dr. Kearney said that patients often do not want to take an increased dose of a beta-blocker because of concerns about side effects, such as tiredness. “They ask me what the side effects of an increased dose would be. My answer is: ‘It will make you live longer.’ Usually, they’ll respond by agreeing to have a little bit more of the beta-blocker. The message here is, if you have a patient with ejection fraction heart failure and diabetes, get them on the optimal dose of a beta-blocker, even at the expense of an ACE inhibitor.”

In 2016, the European Society of Cardiology introduced guidelines for physicians to make a diagnosis of heart failure with preserved ejection fraction. The guidelines mandate that a diagnosis requires signs and symptoms of heart failure, elevated levels of natriuretic peptide, and echocardiographic abnormalities of cardiac structure and/or function in the presence of a left ventricular ejection fraction of 50% or more (Eur J Heart Fail. 2016;18[8]:891-975).

“Signs and symptoms of heart failure, elevated BNP [brain natriuretic peptide], and echocardiography allow us to make a diagnosis of heart failure with preserved ejection fraction,” Dr. Kearney, who is also dean of the Leeds University School of Medicine. “But we don’t know the outcome of these patients, we don’t know how to treat them, and we don’t know the impact on hospitalizations.”

In a large, unpublished cohort study conducted at Leeds, Dr. Kearney and colleagues evaluated how many patients met criteria for heart failure with reduced ejection fraction or heart failure with preserved ejection fraction after undergoing a BNP measurement. Ultimately, 959 patients met criteria. After assessment, 23% had no heart failure, 44% had heart failure with preserved ejection fraction, and 33% had heart failure with reduced ejection fraction. They found that patients with preserved ejection fraction were older (mean age, 84 years); were more likely to be female; and had less ischemia, less diabetes, and more hypertension. In addition, patients with preserved ejection fraction had significantly better survival than patients with reduced ejection fraction over 5 years follow-up.

“What was really interesting were the findings related to hospitalization,” he said. “All 959 patients accounted for 20,517 days in the hospital over 5 years, which is the equivalent of 1 patient occupying a hospital bed for 56 years. This disorder [heart failure with preserved ejection fraction], despite having a lower mortality than heart failure with reduced ejection fraction, leads to a significant burden on health care systems.”

Among patients with preserved ejection fraction, 82% were hospitalized for a noncardiovascular cause, 6.9% because of heart failure, and 11% were caused by other cardiovascular causes. Most of the hospital admissions were because of chest infections, falls, and other frailty-linked causes. “This link between systemic frailty and heart failure with preserved ejection fraction warrants further investigation,” Dr. Kearney said. “This is a major burden on patient hospital care.”

When the researchers examined outcomes in patients with and without diabetes, those with diabetes were younger, more likely to be male, and have a higher body mass index. They found that, in the presence of diabetes, mortality was increased in heart failure with preserved and reduced ejection fraction. “So, even at the age of 81 or 82, diabetes changes the pathophysiology of mortality in what was previously believed to be a benign disease,” he said.

In a subset analysis of patients with and without diabetes who were not taking a beta-blocker, there did not seem to be increased sympathetic activation in the patients with diabetes and heart failure with preserved ejection fraction, nor a difference in heart rate between the nondiabetic patients and patients with diabetes. However, among patients with heart failure with reduced ejection fraction, those with diabetes had an increased heart rate.

“Is heart failure with preserved ejection fraction in diabetes benign? I think the answer is no,” Dr. Kearney said. “It increases hospitalization and is a major burden on health care systems. What should we do? We deal with comorbidity and fall risk. It’s good old-fashioned doctoring, really. We address frailty and respiratory tract infections, but the key thing here is that we need more research.”

Dr. Kearney reported having no relevant financial disclosures.

dbrunk@mdedge.com

LOS ANGELES – When it comes to the optimal treatment of patients with heart failure with preserved ejection fraction and diabetes, cardiologists like Mark T. Kearney, MB ChB, MD, remain stumped.

Courtesy Dr. Mark T. Kearney

“Over the years, the diagnosis of heart failure with preserved ejection fraction has been notoriously difficult [to treat], controversial, and ultimately involves aggressive catheterization of the heart to assess diastolic dysfunction, complex echocardiography, and invasive tests,” Dr. Kearney said at the World Congress on Insulin Resistance, Diabetes, and Cardiovascular Disease. “These patients have an ejection fraction of over 50% and classic signs and symptoms of heart failure. Studies of beta-blockers, angiotensin-converting enzyme inhibitors, and angiotensin II receptor blockers have been unsuccessful in this group of patients. We’re at the beginning of a journey in understanding this disorder, and it’s important, because more and more patients present to us with signs and symptoms of heart failure with an ejection fraction greater than 50%.”

In a recent analysis of 1,797 patients with chronic heart failure, Dr. Kearney, British Heart Foundation Professor of Cardiovascular and Diabetes Research at the Leeds (England) Institute of Cardiovascular and Metabolic Medicine, and colleagues examined whether beta-blockers and ACE inhibitors were associated with differential effects on mortality in patients with and without diabetes (Diabetes Care. 2018;41:136-42). Mean follow-up was 4 years.

For the ACE inhibitor component of the trial, the researchers correlated the dose of ramipril to outcomes and found that each milligram increase of ramipril reduced the risk of death by about 3%. “In the nondiabetic patients who did not receive an ACE inhibitor, mortality was about 60% – worse than most cancers,” Dr. Kearney said. “In patients with diabetes, there was a similar pattern. If you didn’t get an ACE inhibitor, mortality was 70%. So, if you get patients on an optimal dose of an ACE inhibitor, you improve their mortality substantially, whether they have diabetes or not.”

The beta-blocker component of the trial yielded similar results. Each milligram of bisoprolol reduced the risk of death over a mean of 4 years by about 3% in patients without diabetes and 9% in those with diabetes. “Among patients who did not receive a beta-blocker, the mortality was about 70% at 5 years – really terrible,” he said. “Every milligram of bisoprolol was associated with a reduction in mortality of about 9%. So, if a patient gets on an optimal dose of a beta-blocker and they have diabetes, it’s associated with prolongation of life over a year.”

Dr. Kearney said that patients often do not want to take an increased dose of a beta-blocker because of concerns about side effects, such as tiredness. “They ask me what the side effects of an increased dose would be. My answer is: ‘It will make you live longer.’ Usually, they’ll respond by agreeing to have a little bit more of the beta-blocker. The message here is, if you have a patient with ejection fraction heart failure and diabetes, get them on the optimal dose of a beta-blocker, even at the expense of an ACE inhibitor.”

In 2016, the European Society of Cardiology introduced guidelines for physicians to make a diagnosis of heart failure with preserved ejection fraction. The guidelines mandate that a diagnosis requires signs and symptoms of heart failure, elevated levels of natriuretic peptide, and echocardiographic abnormalities of cardiac structure and/or function in the presence of a left ventricular ejection fraction of 50% or more (Eur J Heart Fail. 2016;18[8]:891-975).

“Signs and symptoms of heart failure, elevated BNP [brain natriuretic peptide], and echocardiography allow us to make a diagnosis of heart failure with preserved ejection fraction,” Dr. Kearney, who is also dean of the Leeds University School of Medicine. “But we don’t know the outcome of these patients, we don’t know how to treat them, and we don’t know the impact on hospitalizations.”

In a large, unpublished cohort study conducted at Leeds, Dr. Kearney and colleagues evaluated how many patients met criteria for heart failure with reduced ejection fraction or heart failure with preserved ejection fraction after undergoing a BNP measurement. Ultimately, 959 patients met criteria. After assessment, 23% had no heart failure, 44% had heart failure with preserved ejection fraction, and 33% had heart failure with reduced ejection fraction. They found that patients with preserved ejection fraction were older (mean age, 84 years); were more likely to be female; and had less ischemia, less diabetes, and more hypertension. In addition, patients with preserved ejection fraction had significantly better survival than patients with reduced ejection fraction over 5 years follow-up.

“What was really interesting were the findings related to hospitalization,” he said. “All 959 patients accounted for 20,517 days in the hospital over 5 years, which is the equivalent of 1 patient occupying a hospital bed for 56 years. This disorder [heart failure with preserved ejection fraction], despite having a lower mortality than heart failure with reduced ejection fraction, leads to a significant burden on health care systems.”

Among patients with preserved ejection fraction, 82% were hospitalized for a noncardiovascular cause, 6.9% because of heart failure, and 11% were caused by other cardiovascular causes. Most of the hospital admissions were because of chest infections, falls, and other frailty-linked causes. “This link between systemic frailty and heart failure with preserved ejection fraction warrants further investigation,” Dr. Kearney said. “This is a major burden on patient hospital care.”

When the researchers examined outcomes in patients with and without diabetes, those with diabetes were younger, more likely to be male, and have a higher body mass index. They found that, in the presence of diabetes, mortality was increased in heart failure with preserved and reduced ejection fraction. “So, even at the age of 81 or 82, diabetes changes the pathophysiology of mortality in what was previously believed to be a benign disease,” he said.

In a subset analysis of patients with and without diabetes who were not taking a beta-blocker, there did not seem to be increased sympathetic activation in the patients with diabetes and heart failure with preserved ejection fraction, nor a difference in heart rate between the nondiabetic patients and patients with diabetes. However, among patients with heart failure with reduced ejection fraction, those with diabetes had an increased heart rate.

“Is heart failure with preserved ejection fraction in diabetes benign? I think the answer is no,” Dr. Kearney said. “It increases hospitalization and is a major burden on health care systems. What should we do? We deal with comorbidity and fall risk. It’s good old-fashioned doctoring, really. We address frailty and respiratory tract infections, but the key thing here is that we need more research.”

Dr. Kearney reported having no relevant financial disclosures.

dbrunk@mdedge.com

PHILADELPHIA – In adolescents who have had a Fontan procedure for congenital heart disease, a randomized trial of the phosphodiesterase type 5 inhibitor udenafil showed that it achieved improved exercise performance but did not lead to significant improvement in oxygen levels or myocardial performance.

That’s according to results of the Pediatric Heart Network’s Fontan Udenafil Exercise Longitudinal Trial (FUEL) presented at the American Heart Association scientific sessions. “Treatment with udenafil was not associated with a statistically significant improvement in oxygen consumption at peak exercise, but it was associated with statistically significant improvements in exercise performance at the ventilatory anaerobic threshold,” said David J. Goldberg, MD, of Children’s Hospital of Philadelphia in reporting the FUEL results. The results were published simultaneously in Circulation (2019 Nov 17. doi: 10.1161/CIRCULATIONAHA.119.044352).

“This is the first large clinical trial to show improvement in measures of clinically relevant exercise performance in those with single-ventricle heart disease after Fontan palliation,” he said.

FUEL enrolled 400 male and female adolescents with a single functional ventricle after Fontan surgical palliation. In these patients, pulmonary vascular resistance (PVR) is critical for the efficient flow of blood through the lungs without the benefit of a ventricular pump. “While this circulation is typically stable through childhood, cardiovascular efficiency deteriorates over time, associated with a decline in exercise performance and the accrual of Fontan-associated morbidities,” Dr. Goldberg said. “Given the importance of pulmonary vascular resistance, modulators of PVR make sense as potential therapies.”

FUEL evaluated the effect of udenafil 87.5 mg twice daily versus placebo in post-Fontan patients who’d been on anticoagulation or antiplatelet therapy. The treatment group had a higher percentage of female patients (44% vs. 36% on placebo), but all other baseline characteristics were similar between the two groups.

While the trial found the drug was well tolerated and safe, with side effects typical of PDE5 inhibitors, it did not lead to changes in myocardial performance index, reactive hyperemia index, or log brain natriuretic peptide, Dr. Goldberg said.

At 6 months, both groups showed a decline in exercise data, “as expected,” Dr. Goldberg said. “But that decline was attenuated in the group receiving udenafil,” he said, with peak oxygen consumption declining an average of 0.23 and 0.89 mL/kg per minute in the treatment and placebo groups, respectively (P = 0.092).

Total oxygen consumption, however, actually improved in the udenafil group and declined in the placebo group, 44 mL/min on average versus –3.7 mL/min (P = 0.071).

“There was no significant difference in the change in peak heart rate or the change in peak oxygen saturation between the groups,” Dr. Goldberg said. But three measures at the ventilatory aerobic threshold (VAT) – oxygen consumption, work rate, and ventilation/carbon dioxide output – all showed statistically significant improvement in exercise performance.

“This has important clinical implications,” Dr. Goldberg said of the study findings. “Our study extends recent findings in highlighting the importance of submaximal exercise in the understanding of Fontan physiology. And unlike peak oxygen consumption, submaximal exercise is not constrained by the physiologic ceiling of central venous pressure inherent in exercise physiology after Fontan palliation.”

Maximum oxygen consumption at VAT is likely a more relevant measure after Fontan palliation than is central venous pressure, discussant Craig A. Sable, MD, a pediatric cardiologist in Potomac, Md., noted in his comments. “This is because VAT occurs at about 70% of maximum VO₂ [oxygen consumption] in Fontan as opposed to 55% in two-ventricle physiology,” Dr. Sable said.

In adults with congenital heart disease, maximal VO₂ of 45%-50% of predicted levels portends increased risk of heart failure and death. “Therefore, a medication that addresses the central deficiencies of Fontan physiology and results in improved exercise performance may allow for a longer period of symptom-free survival,” he said.

In an invited commentary in Circulation (2019 Nov 17. doi: 10.1161/CIRCULATIONAHA.119.044512), Marc Gewillig, MD, and Alexander van de Bruaene, MD, of University Hospitals Leuven (Belgium) said that the findings of FUEL and other trials of pulmonary vasodilators after Fontan leave “open for debate” whether the treatment effects of a 3%-5% improvement in oxygen consumption is clinically meaningful for adolescents. “For failing Fontan patients (not studied in FUEL), these improvements are minimal but maybe relevant,” the commentators wrote. But the studies do not resolve whether that’s enough to prevent further decline.

Dr. Goldberg disclosed receiving research grants from trial sponsor Mezzion Pharmaceuticals and the National Heart Lung and Blood Institute. Dr. Sable, Dr. Gewillig, and Dr. van de Bruaene have no financial relationships to disclose.

SOURCE: Goldberg D. AHA 2019, Late Breaking Science Session 5.

PHILADELPHIA – In adolescents who have had a Fontan procedure for congenital heart disease, a randomized trial of the phosphodiesterase type 5 inhibitor udenafil showed that it achieved improved exercise performance but did not lead to significant improvement in oxygen levels or myocardial performance.

That’s according to results of the Pediatric Heart Network’s Fontan Udenafil Exercise Longitudinal Trial (FUEL) presented at the American Heart Association scientific sessions. “Treatment with udenafil was not associated with a statistically significant improvement in oxygen consumption at peak exercise, but it was associated with statistically significant improvements in exercise performance at the ventilatory anaerobic threshold,” said David J. Goldberg, MD, of Children’s Hospital of Philadelphia in reporting the FUEL results. The results were published simultaneously in Circulation (2019 Nov 17. doi: 10.1161/CIRCULATIONAHA.119.044352).

“This is the first large clinical trial to show improvement in measures of clinically relevant exercise performance in those with single-ventricle heart disease after Fontan palliation,” he said.

FUEL enrolled 400 male and female adolescents with a single functional ventricle after Fontan surgical palliation. In these patients, pulmonary vascular resistance (PVR) is critical for the efficient flow of blood through the lungs without the benefit of a ventricular pump. “While this circulation is typically stable through childhood, cardiovascular efficiency deteriorates over time, associated with a decline in exercise performance and the accrual of Fontan-associated morbidities,” Dr. Goldberg said. “Given the importance of pulmonary vascular resistance, modulators of PVR make sense as potential therapies.”

FUEL evaluated the effect of udenafil 87.5 mg twice daily versus placebo in post-Fontan patients who’d been on anticoagulation or antiplatelet therapy. The treatment group had a higher percentage of female patients (44% vs. 36% on placebo), but all other baseline characteristics were similar between the two groups.

While the trial found the drug was well tolerated and safe, with side effects typical of PDE5 inhibitors, it did not lead to changes in myocardial performance index, reactive hyperemia index, or log brain natriuretic peptide, Dr. Goldberg said.

At 6 months, both groups showed a decline in exercise data, “as expected,” Dr. Goldberg said. “But that decline was attenuated in the group receiving udenafil,” he said, with peak oxygen consumption declining an average of 0.23 and 0.89 mL/kg per minute in the treatment and placebo groups, respectively (P = 0.092).

Total oxygen consumption, however, actually improved in the udenafil group and declined in the placebo group, 44 mL/min on average versus –3.7 mL/min (P = 0.071).

“There was no significant difference in the change in peak heart rate or the change in peak oxygen saturation between the groups,” Dr. Goldberg said. But three measures at the ventilatory aerobic threshold (VAT) – oxygen consumption, work rate, and ventilation/carbon dioxide output – all showed statistically significant improvement in exercise performance.

“This has important clinical implications,” Dr. Goldberg said of the study findings. “Our study extends recent findings in highlighting the importance of submaximal exercise in the understanding of Fontan physiology. And unlike peak oxygen consumption, submaximal exercise is not constrained by the physiologic ceiling of central venous pressure inherent in exercise physiology after Fontan palliation.”

Maximum oxygen consumption at VAT is likely a more relevant measure after Fontan palliation than is central venous pressure, discussant Craig A. Sable, MD, a pediatric cardiologist in Potomac, Md., noted in his comments. “This is because VAT occurs at about 70% of maximum VO₂ [oxygen consumption] in Fontan as opposed to 55% in two-ventricle physiology,” Dr. Sable said.

In adults with congenital heart disease, maximal VO₂ of 45%-50% of predicted levels portends increased risk of heart failure and death. “Therefore, a medication that addresses the central deficiencies of Fontan physiology and results in improved exercise performance may allow for a longer period of symptom-free survival,” he said.

In an invited commentary in Circulation (2019 Nov 17. doi: 10.1161/CIRCULATIONAHA.119.044512), Marc Gewillig, MD, and Alexander van de Bruaene, MD, of University Hospitals Leuven (Belgium) said that the findings of FUEL and other trials of pulmonary vasodilators after Fontan leave “open for debate” whether the treatment effects of a 3%-5% improvement in oxygen consumption is clinically meaningful for adolescents. “For failing Fontan patients (not studied in FUEL), these improvements are minimal but maybe relevant,” the commentators wrote. But the studies do not resolve whether that’s enough to prevent further decline.

Dr. Goldberg disclosed receiving research grants from trial sponsor Mezzion Pharmaceuticals and the National Heart Lung and Blood Institute. Dr. Sable, Dr. Gewillig, and Dr. van de Bruaene have no financial relationships to disclose.

SOURCE: Goldberg D. AHA 2019, Late Breaking Science Session 5.

PHILADELPHIA – In adolescents who have had a Fontan procedure for congenital heart disease, a randomized trial of the phosphodiesterase type 5 inhibitor udenafil showed that it achieved improved exercise performance but did not lead to significant improvement in oxygen levels or myocardial performance.

That’s according to results of the Pediatric Heart Network’s Fontan Udenafil Exercise Longitudinal Trial (FUEL) presented at the American Heart Association scientific sessions. “Treatment with udenafil was not associated with a statistically significant improvement in oxygen consumption at peak exercise, but it was associated with statistically significant improvements in exercise performance at the ventilatory anaerobic threshold,” said David J. Goldberg, MD, of Children’s Hospital of Philadelphia in reporting the FUEL results. The results were published simultaneously in Circulation (2019 Nov 17. doi: 10.1161/CIRCULATIONAHA.119.044352).

“This is the first large clinical trial to show improvement in measures of clinically relevant exercise performance in those with single-ventricle heart disease after Fontan palliation,” he said.

FUEL enrolled 400 male and female adolescents with a single functional ventricle after Fontan surgical palliation. In these patients, pulmonary vascular resistance (PVR) is critical for the efficient flow of blood through the lungs without the benefit of a ventricular pump. “While this circulation is typically stable through childhood, cardiovascular efficiency deteriorates over time, associated with a decline in exercise performance and the accrual of Fontan-associated morbidities,” Dr. Goldberg said. “Given the importance of pulmonary vascular resistance, modulators of PVR make sense as potential therapies.”

FUEL evaluated the effect of udenafil 87.5 mg twice daily versus placebo in post-Fontan patients who’d been on anticoagulation or antiplatelet therapy. The treatment group had a higher percentage of female patients (44% vs. 36% on placebo), but all other baseline characteristics were similar between the two groups.

While the trial found the drug was well tolerated and safe, with side effects typical of PDE5 inhibitors, it did not lead to changes in myocardial performance index, reactive hyperemia index, or log brain natriuretic peptide, Dr. Goldberg said.

At 6 months, both groups showed a decline in exercise data, “as expected,” Dr. Goldberg said. “But that decline was attenuated in the group receiving udenafil,” he said, with peak oxygen consumption declining an average of 0.23 and 0.89 mL/kg per minute in the treatment and placebo groups, respectively (P = 0.092).

Total oxygen consumption, however, actually improved in the udenafil group and declined in the placebo group, 44 mL/min on average versus –3.7 mL/min (P = 0.071).

“There was no significant difference in the change in peak heart rate or the change in peak oxygen saturation between the groups,” Dr. Goldberg said. But three measures at the ventilatory aerobic threshold (VAT) – oxygen consumption, work rate, and ventilation/carbon dioxide output – all showed statistically significant improvement in exercise performance.

“This has important clinical implications,” Dr. Goldberg said of the study findings. “Our study extends recent findings in highlighting the importance of submaximal exercise in the understanding of Fontan physiology. And unlike peak oxygen consumption, submaximal exercise is not constrained by the physiologic ceiling of central venous pressure inherent in exercise physiology after Fontan palliation.”

Maximum oxygen consumption at VAT is likely a more relevant measure after Fontan palliation than is central venous pressure, discussant Craig A. Sable, MD, a pediatric cardiologist in Potomac, Md., noted in his comments. “This is because VAT occurs at about 70% of maximum VO₂ [oxygen consumption] in Fontan as opposed to 55% in two-ventricle physiology,” Dr. Sable said.

In adults with congenital heart disease, maximal VO₂ of 45%-50% of predicted levels portends increased risk of heart failure and death. “Therefore, a medication that addresses the central deficiencies of Fontan physiology and results in improved exercise performance may allow for a longer period of symptom-free survival,” he said.

In an invited commentary in Circulation (2019 Nov 17. doi: 10.1161/CIRCULATIONAHA.119.044512), Marc Gewillig, MD, and Alexander van de Bruaene, MD, of University Hospitals Leuven (Belgium) said that the findings of FUEL and other trials of pulmonary vasodilators after Fontan leave “open for debate” whether the treatment effects of a 3%-5% improvement in oxygen consumption is clinically meaningful for adolescents. “For failing Fontan patients (not studied in FUEL), these improvements are minimal but maybe relevant,” the commentators wrote. But the studies do not resolve whether that’s enough to prevent further decline.

Dr. Goldberg disclosed receiving research grants from trial sponsor Mezzion Pharmaceuticals and the National Heart Lung and Blood Institute. Dr. Sable, Dr. Gewillig, and Dr. van de Bruaene have no financial relationships to disclose.

SOURCE: Goldberg D. AHA 2019, Late Breaking Science Session 5.