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          Coronary Heart Disease

CHD is a disease in which plaque (usually made up fat, cholesterol, calcium, and other substances found in the blood) builds up on the inner walls of your coronary arteries. Over time, this plaque can harden or rupture. Hardened plaque narrows the coronary arteries and reduces the flow of oxygen-rich blood to the heart. This can cause chest pain or discomfort called angina.