COVID-19 Linked to Risk of Dangerous Blood Clots in Stroke Patients

News Picture: AHA News: COVID-19 Linked to Risk of Dangerous Blood Clots in Stroke Patients

THURSDAY, Feb. 3, 2022 (American Heart Association News)

Older stroke sufferers who had a historical past of COVID-19 have been extra more likely to develop harmful blood clots within the veins than those that didn’t have the coronavirus-driven illness, a brand new examine from the Centers for Disease Control and Prevention exhibits.

blood clots that type in veins, a situation referred to as venous thromboembolism or VTE, are a standard complication after stroke, Clots can type in a leg or elsewhere, then could break away and block blood provide to the lungsinflicting typically deadly pulmonary embolism,

Several research counsel SARS-CoV-2, the virus that causes COVID-19could enhance the chance of VTE amongst individuals hospitalized with COVID-19stated Xin Tong, the brand new examine’s senior researcher and a senior statistician within the CDC’s Division of Heart Disease and Stroke Prevention,

But Tong stated few research examined the affiliation between COVID-19 and VTE danger amongst individuals with an acute ischemic strokethe most typical sort of stroke wherein a clot in an artery blocks blood circulate to the mind. And none had examined this affiliation between VTE and stroke sufferers who’d had gentle signs of COVID-19 that didn’t require hospitalization.

Tong and her co-authors used Medicare information to look at the affiliation between VTE and COVID-19 amongst 235,567 Medicare beneficiaries ages 65 and older. All had been hospitalized with an acute ischemic stroke between April 2020 and November 2021.

Among them, 7.8% had a historical past of COVID-19, which required hospitalization for barely greater than half.

VTE was commonest amongst these with a historical past of COVID-19 hospitalization, at 4.4%. Among these with COVID-19 that had not required hospitalization, 3.1% had VTE. Those and not using a historical past of COVID-19 have been least more likely to have VTE, at 2.6%.

That translated to a 64% greater danger of VTE amongst stroke sufferers with a historical past of COVID-19 hospitalization, and a 21% greater danger amongst those that’d had COVID-19 however did not must be hospitalized.

The examine will likely be offered subsequent week on the American Stroke Association’s International Stroke Conference. The findings are thought-about preliminary till a full paper is printed in a peer-reviewed journal.

Researchers additionally discovered that Black stroke sufferers had the very best fee of VTE in comparison with different racial and ethnic teams. For instance, 6.3% of Black stroke sufferers who’d beforehand been hospitalized for COVID-19 had VTE. That compares to three.4% and 4.1% of their Hispanic and white counterparts, respectively.

Among the restrictions the researchers acknowledged was they might not determine if the VTE occurred earlier than or in the course of the stroke hospitalizations.

Despite that, and limits on what may be understood about some racial and ethnic teams due to small numbers of sufferers, the examine gives “a good big-picture overview of what we’re seeing” throughout the nation, stated epidemiologist Amelia Ok. Boehme of Columbia University in New York City.

“We know that COVID increases the risk of VTE,” stated Boehme, who was not concerned within the analysis. “We know that ischemic strokes increase the risk of VTE. So the idea that combined COVID and ischemic stroke would further increase the risk of VTE makes sense from a clinical perspective.”

The examine means that stroke sufferers who’ve had COVID-19 must be fastidiously monitored for potential VTE, she stated.

The attainable causes behind a hyperlink between COVID-19 and an elevated danger of VTE are advanced and never nicely understood, Tong stated. Some underlying circumstances of stroke sufferers can overlap with VTE danger components, which embody older age, extended immobility, weight problemsand prior VTE or stroke.

Some of those self same components overlap with danger of extreme COVID-19.


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“Further studies are needed for the likely mechanisms between COVID-19 and increased risk of VTE,” Tong stated. Meanwhile, she stated, docs ought to pay attention to the affiliation and observe protocols for early prevention and therapy.

American Heart Association News covers coronary heart and mind well being. Not all views expressed on this story mirror the official place of the American Heart Association. Copyright is owned or held by the American Heart Association, Inc., and all rights are reserved. If you will have questions or feedback about this story, please electronic mail [email protected],

By Michael Merschel

American Heart Association News

Copyright © 2021 HealthDay. All rights reserved.

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