Clots can block the flow of blood to the heart or brain and cause a heart attack or stroke.

VOA: special.2009.10.20

First, hopefully your blood clots and so that stops you from dying from loss of blood there, but your body tries to heal this wound that's created.

首先,顺利的话血液会形成凝块,使你不至于流血而死,进而身体尝试着去愈合创口

耶鲁公开课 - 生物医学工程探索课程节选

The World Health Organization says passengers who sit still for four or more hours face a greater risk of developing blood clots.

VOA: special.2009.07.14

Many people take aspirin to reduce the risk of a heart attack or stroke from blood clots.

VOA: special.2009.10.20

He thought that this effect might help prevent heart attacks caused by blood clots.

VOA: special.2009.10.20

Scientists say aspirin prevents blood cells called platelets from sticking together to form clots.

VOA: special.2009.10.20

A drug called tissue plasminogen activator, or tPA,can break up blood clots.

VOA: special.2009.09.22

A drug called tPA can break up blood clots.

VOA: special.2009.08.12

Plaque inside the artery can restrict blood flow, and makes blood clots more likely.

VOA: standard.2010.03.04

Blood clots can block an artery and cause a heart attack.

VOA: standard.2010.03.04