Myocardial ischemia does not just mean that it is caused by a blockage in a blood vessel, but that it is a reduction in blood perfusion to the heart, resulting in a reduced supply of oxygen. Myocardial ischemia is mainly caused by lower blood pressure, coronary artery obstruction and sclerosis, reduced blood supply to the aorta leading to a direct reduction in the blood supply to the heart. Heart diseases such as heart valve disease and cardiomyopathy can also lead to a reduction in the blood supply to the heart, and myocardial ischemia is not just caused by referring to a blockage in a blood vessel. Myocardial ischemia results in decreased metabolism due to insufficient blood supply to support the heart’s normal work. Symptoms of myocardial ischemia should be treated under the guidance of a doctor. Pay attention to daily rest, avoid strenuous exercise and overwork.