Arterial bypass. Coloured angiogram showing a grafted artery (upper centre) running between the two femoral (leg) arteries in the groin of a 66-year-old man. The patient's left femur (thigh bone) is seen at right. This arterial graft was carried out to bypass a blocked iliac artery (not seen) and restore normal blood flow. Blocked arteries are usually caused by atheroma (fatty deposits on their inner wall) and can lead to reduced blood supply to particular parts of the body, causing strokes or gangrene (tissue death).
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