MI is the death of myocardial tissue caused by ischemia.

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MI is the death of myocardial tissue caused by the development of ischemia. MI results from insufficient oxygen supply, such as occurs when a coronary artery is occluded by atherosclerotic plaque, thrombus, or myocardial muscle spasm (see Figure 10-16). The pain is caused by ischemia, and if ischemia is not reversed within about 6 hours, the cardiac muscle dies. Coronary thrombosis is the most common cause of MI.

MI Is the Death of Myocardial Tissue Caused by Ischemia