What is definition of myocardial ischemia?

A disorder of cardiac function caused by
insufficient blood flow to the muscle tissue of
the heart. The decreased blood flow may be due to
narrowing of the coronary arteries (coronary
arteriosclerosis), to obstruction by a thrombus
(coronary thrombosis), or less commonly, to
diffuse narrowing of arterioles and other small
vessels within the heart. Severe interruption of
the blood supply to the myocardial tissue may
result in necrosis of cardiac muscle (myocardial

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