For mild coronary heart disease, it is usually not a serious condition. With increasing age, if the patient develops decreased elasticity and increased brittleness of the arterial vessels, different degrees of atherosclerotic plaques will appear in the coronary arteries, and therefore, a certain degree of coronary heart disease will occur. When mild narrowing of the coronary vascular lumen outlet occurs, there will be different degrees of symptoms of inadequate blood supply. However, if the patient has certain symptoms of chest tightness and shortness of breath after exertion or strenuous sports, which can be significantly relieved after resting, it usually belongs to mild coronary heart disease and the situation is not serious. However, if the patient’s symptoms do not improve significantly after resting, or if the patient often has chest tightness, shortness of breath, palpitations, or even pain in the precordial region, it proves that the coronary artery disease is relatively serious, and it is recommended to arrive at the hospital to check the coronary artery with 320-row CT or coronary artery angiography.