There are various types of heart disease, which can be broadly divided into congenital heart disease and acquired heart disease, congenital is mainly due to abnormal fetal development during the embryonic period, while acquired is inseparable from infection, drugs, lifestyle habits, the severity of which is mainly related to the degree of development of the disease, the more critical cardiac lesions are tetralogy of Fallot, acute heart failure, ventricular fibrillation, extensive anterior wall myocardial infarction, severe valvular stenosis The patient can suffocate and die within a short period of time, requiring timely intervention: 1. congenital cardiovascular disease: tetralogy of Fallot, atrial and ventricular septal defects, and patent ductus arteriosus, patent foramen ovale, etc.; 2. heart failure: in acute attacks of heart failure, usually more severe in those with an acute course, not long enough to be life-threatening; 3. arrhythmias: including sinus, atrial, atrioventricular junctional, ventricular arrhythmias, and heart block, of which third-degree atrioventricular block and ventricular fibrillation are more serious; 4, coronary atherosclerotic heart disease: including chronic myocardial ischemic syndrome, acute coronary syndrome, acute coronary syndrome including myocardial infarction, the larger the area of the infarction, the more dangerous the condition; 5, hypertensive heart disease: heart disease caused by increased load on the heart due to elevated blood pressure; 6. Myocardial diseases: including dilated, hypertrophic and restrictive cardiomyopathies, as well as myocarditis; 7. Heart valve diseases: such as mitral valve, aortic valve stenosis and closure insufficiency, multivalvular disease, rheumatic heart disease, etc. The more severe the degree of stenosis or closure insufficiency, the more serious the condition; 8. Pericardial diseases: including acute pericarditis, pericardial effusion and cardiac compression, constrictive pericarditis, acute cardiac compression can cause acute Circulatory failure and shock; 9, infective endocarditis: including autologous valve endocarditis, prosthetic valve endocarditis, etc.