A medical test uses smartphone vibrations and a single drop of blood to detect how well blood will clot. "Almost everyone who has a phone can use this."

Researchers have developed an artificial intelligence-based method to predict the risk of atrial fibrillation within the next five years based on results from electrocardiograms.

This is the first study in which COVID-19 triggered a recurrence in the upper arm of an active 85-year-old man who had a prior diagnosis of upper extremity blood clots.

The rare blood clots some people experienced after receiving the Johnson & Johnson vaccine is more likely after COVID-19 infection, experts report.

The CDC first paused, then unpaused, the administration of the Johnson & Johnson COVID-19 vaccine due to concerns about blood clots. But what are those clots, and how do they form?

AstraZeneca just announced results from its US-based trial. It found the vaccine to be 79% effective and safe for use, despite recent concerns around reports of blood clots.

A research lab at Tufts University is trying to find out how the vitamin may protect against age-related disease.

A new way to break up particularly tough blood clots uses engineered nanodroplets and an ultrasound "drill."

Researchers may have cracked the case of what causes potentially deadly blood clots in serious cases of COVID-19. Autoimmune antibodies may be the culprit.