Myocardial ischemia can survive for years to decades with improved ischemic symptoms if it is well controlled, or sudden death if it is poorly controlled and acute coronary syndrome develops. Myocardial ischemia is most commonly seen in coronary atherosclerotic heart disease, due to atherosclerotic plaque blockage of coronary arteries leading to insufficient blood supply to the myocardium, resulting in chest pain, shortness of breath, panic and other symptoms. For patients with myocardial ischemia, such as improving lifestyle, actively controlling risk factors, standardizing treatment, and trying to slow down the progression of the disease, generally can survive for several years. Without standardized treatment and control of risk factors, acute coronary syndromes such as acute infarction can be induced under certain circumstances, which may lead to sudden cardiac death. Patients with myocardial ischemia should be actively controlled risk factors, timely medication or interventional therapy, and secondary prevention, which reduces myocardial ischemia by lowering blood lipids, decreasing cardiac load, and dilating coronary arteries to reduce the rate of disease and death. If the patient’s myocardial ischemia, it is recommended to consult a doctor in time and follow the doctor’s instructions for active treatment.