Renal artery stenosis: Narrowing of the major artery to the kidney that can lead to seriously elevated blood pressure. Common causes of renal artery stenosis include atherosclerosis and thickening of the muscular wall (fibromuscular dysplasia) of the renal artery.
Quick GuideHigh Blood Pressure (Hypertension): Symptoms, Causes, Treatments
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Last Editorial Review: 6/9/2016