Definition: A stenosis is an abnormal narrowing within an artery, usually caused by atherosclerosis. If a stenosis becomes severe enough, the flow of blood through the artery becomes insufficient, and the tissue being supplied by the artery becomes ischemic.
Stenosis
By Richard N. Fogoros, M.D., About.com
Updated: September 03, 2008
About.com Health's Disease and Condition content is reviewed by our Medical Review Board
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