Myocardial Ischemia
| Definition: |
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 INFARCTION). |
| Notes: |
= defic of myocard blood supply; may lead to MYOCARDIAL INFARCTION |
| Previously Indexed: |
Coronary Disease (1966-1992) |
Myocardial Ischemia Categories.
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Coronary Disease - An imbalance between myocardial functional requirements and the capacity of the coronary vessels to supply sufficient blood flow. It is a form of MYOCARDIAL ISCHEMIA (insufficient blood supply to the heart muscle) caused by a decreased capacity of the coronary vessels. |
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Myocardial Infarction - Gross necrosis of the myocardium, as a result of interruption of the blood supply to the area. (Dorland, 27th ed) |
Myocardial Ischemia Definitions and Terms
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