Heart Diseases [Disease/Finding] Vascular Diseases [Disease/Finding] Myocardial Ischemia [Disease/Finding] 1022046 C7278 M0026104 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 ARTERY DISEASE), 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). 414545008 D017202 Myocardial Ischemia N0000003550 C0151744 Heart Disease, Ischemic Ischemic Heart Disease Ischemia, Myocardial Myocardial Ischemia 414795007