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Atherosclerosis

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Picture of normal artery and artery narrowed by atherosclerosis

Atherosclerosis, sometimes called hardening of the arteries, occurs when fat (cholesterol) and calcium build up in the inner lining of the arteries, forming a substance called plaque. Over time, the plaque buildup narrows the artery and blocks blood flow through it.

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Last Updated: 03/07/2008