What is coronary heart disease? The full name of what we usually call coronary heart disease is coronary atherosclerotic heart disease. Coronary artery disease is just an abbreviation for it. Coronary artery disease is a heart disease in which the coronary arteries, which carry nutrients and oxygen to the heart, become severely atherosclerotic narrowed or blocked, or are combined with spasm and thrombosis, causing blockage of the lumen, resulting in insufficient blood supply to the coronary arteries, thus reducing the blood supply to the heart and not fully meeting the heart’s consumption needs, leading to myocardial ischemia or myocardial infarction. Therefore, coronary heart disease is also called ischemic heart disease. The course of the disease usually begins in childhood and shows clinical symptoms only in the middle and late adulthood. If a blood vessel is completely occluded and there is no other blood vessel to provide blood through the collateral circulation, the part of the heart muscle it supplies has almost no blood supply, and the consequent serious consequence is myocardial infarction. The incidence of coronary heart disease is relatively high in economically developed countries such as Europe and the United States. About 7 million people in the United States suffer from coronary heart disease each year, and about 500,000 die from acute myocardial infarction. Coronary heart disease is the first cause of death. Although the overall incidence of coronary heart disease in our country is relatively low, there is a trend of gradual increase in recent years. Generally speaking, it is higher in the north than in the south, and higher in urban than in rural areas. There is one point that needs special emphasis, that is, atherosclerosis is a systemic lesion. If it occurs in the coronary arteries, it leads to coronary heart disease; if it occurs in the blood vessels of the brain, it will cause cerebral vascular sclerosis and narrowing leading to cerebral infarction, intracranial hemorrhage and other stroke lesions; if it occurs in the kidneys, it will cause hypertension, renal failure and other symptoms. It is common to see patients with coronary heart disease combined with cerebrovascular accident and die from stroke. Especially in Asians, the incidence of cerebrovascular accidents is much higher than that of coronary heart disease myocardial infarction. Therefore, the prevention and treatment of coronary heart disease should be systemic. The main treatment methods of coronary heart disease are currently the following: 1, drug therapy also known as internal conservative treatment. Interventional treatment includes percutaneous transluminal coronary angioplasty (PTCA), intracoronary stenting, coronary intracoronary plaque spinning and grinding, and percutaneous laser coronary angioplasty. 3. Surgical treatment refers to coronary artery bypass grafting (i.e. coronary artery bypass grafting, CABG for short).