Cambridge Encyclopedia » Cambridge Encyclopedia Vol. 5

angina - Symptoms, Diagnosis, Pathophysiology, Epidemiology, Treatment

heart supply blood usually

A sudden severe pain or sensation of constriction over the front of the chest which occurs when the oxygen demand of the heart muscle exceeds supply (angina pectoris). The pain is increased with exercise, and subsides with rest. It may spread to the jaw and arms (usually the left). It usually results from the narrowing or blockage of one or more of the arteries which supply the heart muscle with blood. It can be relieved by the use of drugs which either dilate the blood vessels or reduce the oxygen demands of the heart by reducing the force and frequency of contractions. Severe cases may be treated with surgery to restore the blood supply to the heart.

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