Patients with coronary atherosclerotic heart disease may suffer from coronary artery stenosis, which can cause myocardial ischemia due to insufficient blood supply to the heart muscle. Strenuous exercise, emotional excitement, and stress may cause myocardial ischemia and symptoms of angina pectoris, and patients often experience angina-like pain in the precordial region, which may be relieved after rest or oral nitroglycerin. Patients suffering from viral myocarditis, intercostal neuritis or pleurisy may also have symptoms of chest pain and need to be differentiated. If there is obvious myocardial ischemia, coronary artery CT or cardiac angiography is also required to make a clear diagnosis. Patients suffering from coronary artery disease need to take oral medication to improve the blood supply to the coronary arteries for treatment, and in severe cases, interventional or surgical treatment is required.