The heart is a very important organ in our body, our heart guarantees the normal operation of blood in our body, if our heart has problems, then it will bring harm to our body, so we must protect our heart in our daily life. 1, drug therapy The purpose is to relieve symptoms, reduce the onset of angina pectoris and myocardial infarction; delay the development of coronary atherosclerotic lesions, and reduce coronary heart disease death. Standardized drug treatment can effectively reduce the mortality rate and the occurrence of re-ischemic events in patients with coronary heart disease, and improve the clinical symptoms of patients. And for some patients with severe vascular lesions or even complete obstruction, on the basis of drug therapy, revascularization therapy can further reduce the mortality of patients. 2.Percutaneous coronary intervention (PCI) Percutaneous transluminal coronary angioplasty (PTCA) applies a specially designed catheter with a balloon, which is delivered to the coronary stenosis through the peripheral artery (femoral or radial artery). The filling balloon can dilate the narrowed lumen, improve blood flow, and place a stent in the dilated stenosis to prevent restenosis. It can also be combined with thrombus aspiration and rotational grinding. It is indicated for patients with stable angina pectoris, unstable angina pectoris and myocardial infarction that are poorly controlled by medications. Emergency intervention is preferred in the acute phase of myocardial infarction, and the timing is very important, the earlier the better. 3.Coronary artery bypass grafting (abbreviated as coronary artery bypass grafting, CABG) Coronary artery bypass grafting relieves chest pain and local ischemia, improves patients’ quality of life, and can prolong patients’ lives by restoring myocardial blood perfusion. It is indicated for patients with severe coronary artery disease, patients who cannot receive interventional therapy or who have relapsed after treatment, and patients with angina pectoris after myocardial infarction, or with complications such as ventricular wall aneurysm, mitral valve insufficiency, or septal perforation, who should undergo coronary artery bypass grafting while treating the complications. The choice of surgery should be decided jointly by the cardiologist and cardiac surgeon and the patient.