Primary care doctors and specialists should advise patients who have already experienced a heart attack or stroke that they are at a higher risk for long COVID and need to take steps to avoid contracting the virus, according to new research.
The study, led by researchers at Columbia University, New York City, suggests that anyone with cardiovascular disease (CVD) — defined as having experienced a heart attack or stroke — should consider getting the updated COVID vaccine boosters. They also suggest patients with CVD take other steps to avoid an acute infection, such as avoiding crowded indoor spaces.
There is no specific test or treatment for long COVID, which can become disabling and chronic. Long COVID is defined by the failure to recover from acute COVID-19 in 90 days.
The scientists used data from nearly 5000 people enrolled in 14 established, ongoing research programs, including the 76-year-old Framingham Heart Study. The results of the analysis of the “mega-cohort” were published in JAMA Network Open.
Most of the 14 studies already had 10-20 years of data on the cardiac health of thousands of enrollees, said Norrina B. Allen, one of the authors and a cardiac epidemiologist at Northwestern University Feinberg School of Medicine in Chicago, Illinois.
“This is a particularly strong study that looked at risk factors — or individual health — prior to developing COVID and their impact on the likely of recovering from COVID,” she said.
In addition to those with CVD, women and adults with preexisting chronic illnesses took longer to recover.
More than 20% of those in the large, racially and ethnically diverse US population–based study did not recover from COVID in 90 days. The researchers found that the median self-reported time to recovery from acute infection was 20 days.
While women and those with chronic illness had a higher risk for long COVID, vaccination and infection with the Omicron variant wave were associated with shorter recovery times.
These findings make sense, said Ziyad Al-Aly, MD, chief of research at Veterans Affairs St. Louis Health Care System and clinical epidemiologist at Washington University in St. Louis, Missouri.
“We also see that COVID-19 can lead to new-onset cardiovascular disease,” said Al-Aly, who was not involved in the study. “There is clearly a (link) between COVID and cardiovascular disease. These two seem to be intimately intertwined. In my view, this emphasizes the importance of targeting these individuals for vaccination and potentially antivirals (when they get infected) to help reduce their risk of adverse events and ameliorate their chance of full and fast recovery.”
The study used data from the Collaborative Cohort of Cohorts for COVID-19 Research. The long list of researchers contributing to this study includes epidemiologists, biostatisticians, neurologists, pulmonologists, and cardiologists. The data come from a list of cohorts like the Framingham Heart Study, which identified key risk factors for CVD, including cholesterol levels. Other studies include the Atherosclerosis Risk in Communities study, which began in the mid-1980s. Researchers there recruited a cohort of 15,792 men and women in rural North Carolina and Mississippi and suburban Minneapolis. They enrolled a high number of African American participants, who have been underrepresented in past studies. Other cohorts focused on young adults with CVD and Hispanics, while another focused on people with chronic obstructive pulmonary disease.
Lead author Elizabeth C. Oelsner, MD, of Columbia University Irving Medical Center in New York City, said she was not surprised by the CVD-long COVID link.
“We were aware that individuals with CVD were at higher risk of a more severe acute infection,” she said. “We were also seeing evidence that long and severe infection led to persistent symptoms.”
Oelsner noted that many patients still take more than 3 months to recover, even during the Omicron wave.
“While that has improved over the course of the pandemic, many individuals are taking a very long time to recover, and that can have a huge burden on the patient,” she said.
She encourages healthcare providers to tell patients at higher risk to take steps to avoid the virus, including vaccination and boosters.
A version of this article first appeared on Medscape.com.