Renal artery stenosis is the most common cause of secondary hypertension. Over 90%
of renal artery stenoses are caused by arteriosclerosis, the remainder resulting from fibromuscular dysplasia which usually does not lead to progressive azotemia and end stage renal disease. Renal angioplasty is the treatment of choice for fibromuscular dysplastic disease and has the potential of curing hypertension if performed early.