Detailed text transcripts for TV channel - CNN - 20110303:12:55:00
From are the vaps of the lower leg. this is important. when you talk about the deep veins of the lower leg, these are not veins you can necessarily feel. take a look in blue there. that is the valve around one of these deep veins. you see a clot starting to form over there. after some time that clot could essentially break off and start to travel throughout the entire body and specifically it goes through the blood system and lands up in the lungs. that is what a pulmonary embolism it. blocks one of the veins in the lungs. if that clot is big enough, it can cause death within just a few minute...
Source: news source