Coronary heart disease is mainly manifested in the following seven clinical types: 1, stable angina; 2, stable angina; 3, acute or old myocardial infarction; 4, primary cardiac arrest; 5, ischemic cardiomyopathy; 6, arrhythmia; 7, asymptomatic myocardial ischemia. The same patient with coronary artery disease may have different clinical manifestations in different courses of the disease, such as stable angina pectoris at the beginning of the disease, which may develop into unstable angina pectoris after a period of time, or even acute myocardial infarction; after acute myocardial infarction, which is called the stage of old myocardial infarction, some patients with coronary artery disease may have angina pectoris again, or even acute myocardial infarction again, as well as severe and fatal arrhythmias.