http://www.nhlbi.nih.gov/health/public/heart/pad/materials/pad_extfctsht_general.html
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National Heart, Lung, and Blood Institute, National Institutes of Health
Peripheral arterial disease, or P.A.D., develops when your arteries become clogged with plaque—fatty deposits that limit blood flow to your legs. Just like clogged arteries in the heart, clogged arteries in the legs mean you are at risk for having a heart attack or stroke. This fact sheet answers key questions about P.A.D. and provides steps you can take to reduce your risk.