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Stroke

By , About.com Guide

Updated February 09, 2011

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Definition:

A stroke occurs when blood flow to the brain is disrupted due to a ruptured blood vessel or the presence of a blood clot, limiting oxygen and other nutrients needed for the brain to function properly. The blood clot can form in a nearby artery, or break off and travel to the brain from another part of the body.

In some cases, high cholesterol can play a role in causing strokes. This occurs when cholesterol and other fats deposit on inflamed areas of arteries, referred to as atherosclerosis. This forms a plaque within the artery that gradually thickens, preventing blood from flowing properly. This can cause blood clots to form, restricting blood flow to the brain or traveling from another area of the body.

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