BSIP, CAVALLINI JAMES / SCIENCE PHOTO LIBRARY BSIP, CAVALLINI JAMES / SCIENCE PHOTO LIBRARY
Thrombosis in leg artery. Coloured angiogram (X- ray) of a blockage (thrombosis) in the popliteal artery (black). The blockage is seen as the abrupt narrowing of the thick artery just to the right of centre. The bones of the knee joint are seen at upper left and lower centre. Thrombosis is a condition in which an abnormal blood clot (thrombus) becomes stuck in a blood vessel, impeding the flow of blood. This may lead to pain and the death of the tissue supplied by the blood vessel. It can be treated with anticoagulant drugs. Angiograms are made by injecting a radio- opaque contrast medium into the bloodstream.
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