By Mohammed Jinadu
The increase of heart attacks and strokes for as long as three years after an infection, has been linked to COVID-19, a large new study suggests.
The study was published Wednesday in the medical journal Atherosclerosis, Thrombosis, and Vascular Biology. It relied on medical records from roughly a quarter of a million people who were enrolled in a large database called the UK Biobank.
Within this dataset, researchers identified more than 11,000 people who had a positive lab test for Covid-19 documented in their medical records in 2020; nearly 3,000 of them had been hospitalized for their infections. They compared these groups with more than 222,000 others in the same database who didn’t have a history of Covid-19 over the same time frame.
People who caught Covid in 2020, before there were vaccines to blunt the infection, had twice the risk of a major cardiac event like a heart attack or stroke or death for almost three years after their illness, compared with the people who didn’t test positive, the study found.
People who caught Covid in 2020, before there were vaccines to blunt the infection, had twice the risk of a major cardiac event like a heart attack or stroke or death for almost three years after their illness, compared with the people who didn’t test positive, the study found.
One study estimated that more than 3.5 million Americans were hospitalized for Covid between May 2020 and April 2021.
Which shows clearly that elevated heart risks from infection did not appear to diminish over time, the study found.
“There’s no sign of attenuation of that risk,” said study author Dr. Stanley Hazen, who chairs the department of Cardiovascular & Metabolic Sciences at the Cleveland Clinic. “That’s actually one of the more interesting, I think, surprising findings.”
That finding is striking and seems to be unique to Covid-19, said Dr. Patricia Best, a cardiologist at the Mayo Clinic in Rochester, Minnesota, who was not involved in the research.
“We have known for some time that infections raise your risk of having a heart attack, so that if you have influenza, if you get any kind of infection … whether it’s bacterial or viral, that increases your risk of having a heart attack,” Best said. “But it generally goes away pretty quickly after your infection.
“This is just such a large effect, and I think it’s just because of how different Covid is than some of the other infections,” she said.
The researchers believe that the gene that codes for blood type may be playing a role in the increased risk in heart attacks and strokes after Covid, but they aren’t sure exactly how.
There was some hopeful news in the study, too. People who were hospitalized for Covid but who were also taking low-dose aspirin had no increase in the likelihood of a subsequent heart attack or stroke. That means the risk can be mitigated.