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SNOWMASS, COLO. – Be leery of lowering high blood pressure too much in patients with lower extremity peripheral artery disease, Robert A. Vogel, MD, cautioned the Annual Cardiovascular Conference at Snowmass sponsored by the American College of Cardiology
“We used to worry about lowering blood pressure too much in [coronary artery disease]. I need to rekindle that thought, because you want to be very careful about lowering blood pressure too much in PAD,” said Dr. Vogel, a preventive cardiology specialist at the University of Colorado, Denver.
He cited a recent reanalysis of data from the landmark ALLHAT (Antihypertensive and Lipid-lowering Treatment to Prevent Heart Attack Trial) conducted by investigators at Stanford (Calif.) University. During a median 4.3 years of prospective follow-up of 33,357 participants with a median baseline blood pressure of 146/84 mm Hg, the risk of the composite endpoint of lower extremity PAD events – defined as PAD-related hospitalization, revascularization procedures, medical treatment, or PAD-related death – was increased by 26% in patients with a systolic blood pressure below 120 mm Hg, compared with an SBP of 120-129 mm Hg.
In a similar Cox regression analysis, the risk of PAD events was increased by 72% in patients with a diastolic blood pressure below 60 mm Hg, compared with that of patients with a DBP of 70-79 mm Hg, and to a lesser, albeit still statistically significant and clinically meaningful, extent in those with a DBP of 60-69 mm Hg (Circulation. 2018;138:1805-14).
Dr. Vogel’s cautionary note about overzealous blood pressure–lowering was one of several developments he highlighted since publication of the 2016 American Heart Association/American College of Cardiology guidelines on the medical management of lower extremity PAD (J Am Coll Cardiol. 2017;69:1465-508). Others include new data demonstrating that proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitor therapy shows particularly strong benefit in the patient subgroup with PAD, as did rivaroxaban (Xarelto) at 2.5 mg b.i.d. plus aspirin 100 mg/day in the COMPASS trial.
Also, the final week of 2018 saw publication of the ACC Expert Consensus Decision Pathway on Tobacco Cessation (J Am Coll Cardiol. 2018 Dec 25;72[25]:3332-65), which Dr. Vogel considers an exemplary document every physician who cares for patients with PAD ought to read.
The Class I recommendations in the ACC/AHA guidelines for medical management of PAD include introducing a supervised exercise program before resorting to a revascularization procedure, providing advice on smoking cessation at every visit, antiplatelet therapy, a high-intensity statin, cilostazol for claudication, and coordination of the patient’s diabetes care with an endocrinologist or primary care physician.
Numerous studies have documented that physicians by and large aren’t doing so well in bringing these evidence-based therapies to bear. For example, a recent study of 155,647 Veterans Affairs patients with new-onset PAD found that 28% weren’t on a statin. Only 18.4% with PAD and comorbid coronary or carotid disease were on a high-intensity statin, as were just 6.4% with PAD only. In a multivariate adjusted analysis, high-intensity statin users had a 33% lower risk of amputation and a 26% lower risk of mortality, compared with statin nonusers (Circulation. 2018;137:1435-46).
It’s as if there’s a widespread failure to appreciate the substantial morbidity and mortality conferred by PAD, so Dr. Vogel put it into perspective: “In broad strokes, atherosclerosis starts in the aorta, moves to the coronaries, goes to the carotids, and ends up in the legs. By the time you have lower-extremity atherosclerosis, you are a vasculopath,” he explained.
Smoking cessation
“Lower-extremity PAD is a disease of smoking. Cholesterol goes to the heart, blood pressure goes to the head, and smoking goes to the legs, in broad strokes. Current smokers are 12 times more likely to have PAD than never smokers. And if you stop smoking, you reduce death by more than 50%,” the cardiologist said.
“You’ve got to get these folks to stop smoking, a difficult task. I do my clinical work at a VA hospital, and I can tell you this is a challenge,” he continued.
The new ACC Expert Consensus report is a boon in this regard.
“It’s not that long, and it’s very, very good. Very helpful. It’s not theoretical, it’s very practical,” according to Dr. Vogel. But he didn’t sugar coat what’s involved in getting PAD patients to quit smoking.
“At best, per round of smoking cessation, with pharmacology as well as multiple-session counseling, you can get 15%-20% abstinence per cycle. And it often takes many cycles of counseling to get people to stop smoking,” he added.
Low-dose rivaroxaban plus aspirin
Dr. Vogel believes the combination of low-dose rivaroxaban plus aspirin is worthy of serious consideration in patients with PAD on the strength of the COMPASS trial, a randomized, double-blind study of more than 27,000 patients with stable CAD, 27% of whom also had PAD. The PAD group on rivaroxaban 2.5 mg b.i.d. plus aspirin had a 28% relative risk reduction in the composite endpoint of cardiovascular death, stroke, or MI, compared with those on aspirin plus placebo. This benefit came at a cost of a 51% increase in the risk of major bleeding, but not fatal bleeding or bleeding causing critical damage to the brain or other organs.
Taking into account both the primary efficacy and severe bleeding rates, the net clinical benefit of low-dose rivaroxaban was 20%. The absolute risk reduction was larger in the PAD subgroup than in those with CAD-only because of their greater baseline risk (N Engl J Med. 2017;377:1319-30).
At present a 2.5-mg dose of rivaroxaban isn’t commercially available, so patients have to cut higher-dose tablets, but on the strength of the COMPASS results, a 2.5-mg tablet is in the works, Dr. Vogel said.
PCSK9 inhibitors
In the FOURIER trial of evolocumab (Praluent) versus placebo on top of maximally tolerated statin therapy in more than 27,000 patients with atherosclerotic disease, including 3,642 with PAD, the rate of MALE (major adverse limb events) was reduced by 42% in the evolocumab group, with a number-needed-to-treat in order to prevent one additional MALE event of only 16 (Circulation. 2018;137:338-50).
“This is a subgroup that really benefits from PCSK9 inhibition. It’s something to think about,” Dr. Vogel said.
Dr. Vogel reported serving as a paid consultant to the National Football League and the Pritikin Longevity Center, receiving research grants from Sanofi, and serving on speakers bureaus for Regeneron and Sanofi.
SNOWMASS, COLO. – Be leery of lowering high blood pressure too much in patients with lower extremity peripheral artery disease, Robert A. Vogel, MD, cautioned the Annual Cardiovascular Conference at Snowmass sponsored by the American College of Cardiology
“We used to worry about lowering blood pressure too much in [coronary artery disease]. I need to rekindle that thought, because you want to be very careful about lowering blood pressure too much in PAD,” said Dr. Vogel, a preventive cardiology specialist at the University of Colorado, Denver.
He cited a recent reanalysis of data from the landmark ALLHAT (Antihypertensive and Lipid-lowering Treatment to Prevent Heart Attack Trial) conducted by investigators at Stanford (Calif.) University. During a median 4.3 years of prospective follow-up of 33,357 participants with a median baseline blood pressure of 146/84 mm Hg, the risk of the composite endpoint of lower extremity PAD events – defined as PAD-related hospitalization, revascularization procedures, medical treatment, or PAD-related death – was increased by 26% in patients with a systolic blood pressure below 120 mm Hg, compared with an SBP of 120-129 mm Hg.
In a similar Cox regression analysis, the risk of PAD events was increased by 72% in patients with a diastolic blood pressure below 60 mm Hg, compared with that of patients with a DBP of 70-79 mm Hg, and to a lesser, albeit still statistically significant and clinically meaningful, extent in those with a DBP of 60-69 mm Hg (Circulation. 2018;138:1805-14).
Dr. Vogel’s cautionary note about overzealous blood pressure–lowering was one of several developments he highlighted since publication of the 2016 American Heart Association/American College of Cardiology guidelines on the medical management of lower extremity PAD (J Am Coll Cardiol. 2017;69:1465-508). Others include new data demonstrating that proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitor therapy shows particularly strong benefit in the patient subgroup with PAD, as did rivaroxaban (Xarelto) at 2.5 mg b.i.d. plus aspirin 100 mg/day in the COMPASS trial.
Also, the final week of 2018 saw publication of the ACC Expert Consensus Decision Pathway on Tobacco Cessation (J Am Coll Cardiol. 2018 Dec 25;72[25]:3332-65), which Dr. Vogel considers an exemplary document every physician who cares for patients with PAD ought to read.
The Class I recommendations in the ACC/AHA guidelines for medical management of PAD include introducing a supervised exercise program before resorting to a revascularization procedure, providing advice on smoking cessation at every visit, antiplatelet therapy, a high-intensity statin, cilostazol for claudication, and coordination of the patient’s diabetes care with an endocrinologist or primary care physician.
Numerous studies have documented that physicians by and large aren’t doing so well in bringing these evidence-based therapies to bear. For example, a recent study of 155,647 Veterans Affairs patients with new-onset PAD found that 28% weren’t on a statin. Only 18.4% with PAD and comorbid coronary or carotid disease were on a high-intensity statin, as were just 6.4% with PAD only. In a multivariate adjusted analysis, high-intensity statin users had a 33% lower risk of amputation and a 26% lower risk of mortality, compared with statin nonusers (Circulation. 2018;137:1435-46).
It’s as if there’s a widespread failure to appreciate the substantial morbidity and mortality conferred by PAD, so Dr. Vogel put it into perspective: “In broad strokes, atherosclerosis starts in the aorta, moves to the coronaries, goes to the carotids, and ends up in the legs. By the time you have lower-extremity atherosclerosis, you are a vasculopath,” he explained.
Smoking cessation
“Lower-extremity PAD is a disease of smoking. Cholesterol goes to the heart, blood pressure goes to the head, and smoking goes to the legs, in broad strokes. Current smokers are 12 times more likely to have PAD than never smokers. And if you stop smoking, you reduce death by more than 50%,” the cardiologist said.
“You’ve got to get these folks to stop smoking, a difficult task. I do my clinical work at a VA hospital, and I can tell you this is a challenge,” he continued.
The new ACC Expert Consensus report is a boon in this regard.
“It’s not that long, and it’s very, very good. Very helpful. It’s not theoretical, it’s very practical,” according to Dr. Vogel. But he didn’t sugar coat what’s involved in getting PAD patients to quit smoking.
“At best, per round of smoking cessation, with pharmacology as well as multiple-session counseling, you can get 15%-20% abstinence per cycle. And it often takes many cycles of counseling to get people to stop smoking,” he added.
Low-dose rivaroxaban plus aspirin
Dr. Vogel believes the combination of low-dose rivaroxaban plus aspirin is worthy of serious consideration in patients with PAD on the strength of the COMPASS trial, a randomized, double-blind study of more than 27,000 patients with stable CAD, 27% of whom also had PAD. The PAD group on rivaroxaban 2.5 mg b.i.d. plus aspirin had a 28% relative risk reduction in the composite endpoint of cardiovascular death, stroke, or MI, compared with those on aspirin plus placebo. This benefit came at a cost of a 51% increase in the risk of major bleeding, but not fatal bleeding or bleeding causing critical damage to the brain or other organs.
Taking into account both the primary efficacy and severe bleeding rates, the net clinical benefit of low-dose rivaroxaban was 20%. The absolute risk reduction was larger in the PAD subgroup than in those with CAD-only because of their greater baseline risk (N Engl J Med. 2017;377:1319-30).
At present a 2.5-mg dose of rivaroxaban isn’t commercially available, so patients have to cut higher-dose tablets, but on the strength of the COMPASS results, a 2.5-mg tablet is in the works, Dr. Vogel said.
PCSK9 inhibitors
In the FOURIER trial of evolocumab (Praluent) versus placebo on top of maximally tolerated statin therapy in more than 27,000 patients with atherosclerotic disease, including 3,642 with PAD, the rate of MALE (major adverse limb events) was reduced by 42% in the evolocumab group, with a number-needed-to-treat in order to prevent one additional MALE event of only 16 (Circulation. 2018;137:338-50).
“This is a subgroup that really benefits from PCSK9 inhibition. It’s something to think about,” Dr. Vogel said.
Dr. Vogel reported serving as a paid consultant to the National Football League and the Pritikin Longevity Center, receiving research grants from Sanofi, and serving on speakers bureaus for Regeneron and Sanofi.
SNOWMASS, COLO. – Be leery of lowering high blood pressure too much in patients with lower extremity peripheral artery disease, Robert A. Vogel, MD, cautioned the Annual Cardiovascular Conference at Snowmass sponsored by the American College of Cardiology
“We used to worry about lowering blood pressure too much in [coronary artery disease]. I need to rekindle that thought, because you want to be very careful about lowering blood pressure too much in PAD,” said Dr. Vogel, a preventive cardiology specialist at the University of Colorado, Denver.
He cited a recent reanalysis of data from the landmark ALLHAT (Antihypertensive and Lipid-lowering Treatment to Prevent Heart Attack Trial) conducted by investigators at Stanford (Calif.) University. During a median 4.3 years of prospective follow-up of 33,357 participants with a median baseline blood pressure of 146/84 mm Hg, the risk of the composite endpoint of lower extremity PAD events – defined as PAD-related hospitalization, revascularization procedures, medical treatment, or PAD-related death – was increased by 26% in patients with a systolic blood pressure below 120 mm Hg, compared with an SBP of 120-129 mm Hg.
In a similar Cox regression analysis, the risk of PAD events was increased by 72% in patients with a diastolic blood pressure below 60 mm Hg, compared with that of patients with a DBP of 70-79 mm Hg, and to a lesser, albeit still statistically significant and clinically meaningful, extent in those with a DBP of 60-69 mm Hg (Circulation. 2018;138:1805-14).
Dr. Vogel’s cautionary note about overzealous blood pressure–lowering was one of several developments he highlighted since publication of the 2016 American Heart Association/American College of Cardiology guidelines on the medical management of lower extremity PAD (J Am Coll Cardiol. 2017;69:1465-508). Others include new data demonstrating that proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitor therapy shows particularly strong benefit in the patient subgroup with PAD, as did rivaroxaban (Xarelto) at 2.5 mg b.i.d. plus aspirin 100 mg/day in the COMPASS trial.
Also, the final week of 2018 saw publication of the ACC Expert Consensus Decision Pathway on Tobacco Cessation (J Am Coll Cardiol. 2018 Dec 25;72[25]:3332-65), which Dr. Vogel considers an exemplary document every physician who cares for patients with PAD ought to read.
The Class I recommendations in the ACC/AHA guidelines for medical management of PAD include introducing a supervised exercise program before resorting to a revascularization procedure, providing advice on smoking cessation at every visit, antiplatelet therapy, a high-intensity statin, cilostazol for claudication, and coordination of the patient’s diabetes care with an endocrinologist or primary care physician.
Numerous studies have documented that physicians by and large aren’t doing so well in bringing these evidence-based therapies to bear. For example, a recent study of 155,647 Veterans Affairs patients with new-onset PAD found that 28% weren’t on a statin. Only 18.4% with PAD and comorbid coronary or carotid disease were on a high-intensity statin, as were just 6.4% with PAD only. In a multivariate adjusted analysis, high-intensity statin users had a 33% lower risk of amputation and a 26% lower risk of mortality, compared with statin nonusers (Circulation. 2018;137:1435-46).
It’s as if there’s a widespread failure to appreciate the substantial morbidity and mortality conferred by PAD, so Dr. Vogel put it into perspective: “In broad strokes, atherosclerosis starts in the aorta, moves to the coronaries, goes to the carotids, and ends up in the legs. By the time you have lower-extremity atherosclerosis, you are a vasculopath,” he explained.
Smoking cessation
“Lower-extremity PAD is a disease of smoking. Cholesterol goes to the heart, blood pressure goes to the head, and smoking goes to the legs, in broad strokes. Current smokers are 12 times more likely to have PAD than never smokers. And if you stop smoking, you reduce death by more than 50%,” the cardiologist said.
“You’ve got to get these folks to stop smoking, a difficult task. I do my clinical work at a VA hospital, and I can tell you this is a challenge,” he continued.
The new ACC Expert Consensus report is a boon in this regard.
“It’s not that long, and it’s very, very good. Very helpful. It’s not theoretical, it’s very practical,” according to Dr. Vogel. But he didn’t sugar coat what’s involved in getting PAD patients to quit smoking.
“At best, per round of smoking cessation, with pharmacology as well as multiple-session counseling, you can get 15%-20% abstinence per cycle. And it often takes many cycles of counseling to get people to stop smoking,” he added.
Low-dose rivaroxaban plus aspirin
Dr. Vogel believes the combination of low-dose rivaroxaban plus aspirin is worthy of serious consideration in patients with PAD on the strength of the COMPASS trial, a randomized, double-blind study of more than 27,000 patients with stable CAD, 27% of whom also had PAD. The PAD group on rivaroxaban 2.5 mg b.i.d. plus aspirin had a 28% relative risk reduction in the composite endpoint of cardiovascular death, stroke, or MI, compared with those on aspirin plus placebo. This benefit came at a cost of a 51% increase in the risk of major bleeding, but not fatal bleeding or bleeding causing critical damage to the brain or other organs.
Taking into account both the primary efficacy and severe bleeding rates, the net clinical benefit of low-dose rivaroxaban was 20%. The absolute risk reduction was larger in the PAD subgroup than in those with CAD-only because of their greater baseline risk (N Engl J Med. 2017;377:1319-30).
At present a 2.5-mg dose of rivaroxaban isn’t commercially available, so patients have to cut higher-dose tablets, but on the strength of the COMPASS results, a 2.5-mg tablet is in the works, Dr. Vogel said.
PCSK9 inhibitors
In the FOURIER trial of evolocumab (Praluent) versus placebo on top of maximally tolerated statin therapy in more than 27,000 patients with atherosclerotic disease, including 3,642 with PAD, the rate of MALE (major adverse limb events) was reduced by 42% in the evolocumab group, with a number-needed-to-treat in order to prevent one additional MALE event of only 16 (Circulation. 2018;137:338-50).
“This is a subgroup that really benefits from PCSK9 inhibition. It’s something to think about,” Dr. Vogel said.
Dr. Vogel reported serving as a paid consultant to the National Football League and the Pritikin Longevity Center, receiving research grants from Sanofi, and serving on speakers bureaus for Regeneron and Sanofi.
EXPERT ANALYSIS FROM ACC SNOWMASS 2019