Peripheral arterial disease or PAD is also known as peripheral vascular disease (PVD). It is a circulatory problem in which the peripheral arteries become narrow and are unable to supply oxygenated blood to the limbs, particularly the legs. The condition results in extreme pain and weakening of the organ where the blood supply is reduced. In severe cases, the peripheral arterial disease may result in heart attack and strokes. PAD is the most common circulatory condition in African-Americans. Men are affected by this condition more than women.