Peripheral arterial disease is the condition of narrowing of the veins as a result of swellings extending into the vein with a high
cholesterol (a kind of fat in the body) content between the layers of the arterial wall, and as a result,
the inability to get enough blood to the area fed by the vein.
Sometimes, narrowing of the veins can occur as a result of inflammatory diseases of the vascular wall,
rheumatic diseases, diseases involving the immune system, coagulation in the vein, congenital diseases or other disorders.