Blood clots stay at least 49 weeks after Covid

A recent study has found that the risk for certain problems is high up to 49 weeks after being diagnosed with Covid.

According to research published in the American Heart Association journal Circulation, the risk of blood clots forming in the great arteries at this point was nearly twice that in people with COVID-19 compared with those without.

DATA OF 48 MILLION PERSONS REVIEWED

The study, which spanned January through December 2020, used data collected anonymously from 48 million people, nearly every adult in England and Wales.

Jonathan Sterne, a professor of medical statistics and epidemiology at the University of Bristol in the UK and author of the study, said the findings reinforce the message that “taking preventative medications and managing risk factors is even more important than before the pandemic” for people with cardiovascular conditions.

FIRST WEEK RISK 33 TIMES HIGHER

The researchers found that in the first week after diagnosis of COVID-19, the risk of arterial blood clots, the type that could cause a heart attack or ischemic stroke, was about 22 times higher than for non-Covid people. It was noted that this risk fell sharply in the second week, increasing less than fourfold.

Between 27 and 49 weeks, the risk of arterial clots increases by about 30 percent, Sterne said.

In the first week after diagnosis of COVID-19, the risk of such venous problems was 33 times higher, while in the third and fourth weeks after diagnosis, the risk was still about eight times higher. After 27 to 49 weeks, it was emphasized that the risk is still 1.8 times higher than for someone who has never had COVID-19.

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