There are more types of heart disease, which are categorized differently in terms of etiology, pathological anatomy, and pathophysiology. The most serious heart diseases are mainly fatal heart diseases, such as massive myocardial infarction and ventricular fibrillation. 1. Classification according to etiology. Generally it can be divided into congenital heart disease, rheumatic heart disease, atherosclerotic heart disease, hypertensive heart disease, pneumonic heart disease, infectious heart disease, endocrine heart disease, metabolic heart disease and other types. 2. Classify according to anatomy. It is mainly divided into coronary artery lesions, myocardial lesions, endocardial lesions, pericardial lesions, cardiac tumors and so on. 3. Classify according to pathophysiology. It can generally be divided into angina pectoris, myocardial infarction, arrhythmia, heart failure, etc.