It is also called peripheral artery disease. It is a condition that causes blood flow to be blocked as a result of narrowing and blockage of the large vessels in the legs. Leg vein occlusion usually occurs as a result of a process called atherosclerosis. Atherosclerosis is a condition characterized by fat accumulation and inflammation in artery walls. Over time, these accumulations can form hard structures called plaques. If these plaques damage the artery walls...