what is myocardial ischemia
myocardial ischemia, a condition of insufficient blood flow to the heart muscle via the coronary arteries, often resulting in chest pain (angina pectoris).In diagnostic imaging, thallium-201 or other substances are injected into the blood to reveal areas of myocardial ischemia.deficiency of blood supply to the heart muscle, due to obstruction or constriction of the coronary arteries. renal ischemia. severe or prolonged ischemia causes irreversible renal failure and death from uremia.erebral ischemia. brain anoxia. myocardial ischemia. deficiency of blood supply to the heart muscle, due to obstruction or constriction of the coronary arteries. renal ischemia. severe or prolonged ischemia causes irreversible renal failure and death from uremia.