Coronary heart disease includes chronic coronary artery disease and acute coronary syndrome, with the former having a fair and relatively non-serious prognosis, and the latter having a relatively worse and more serious prognosis. Coronary heart disease, i.e. coronary atherosclerotic heart disease, is the occurrence of atherosclerosis in the coronary arteries supplying blood to the heart, causing narrowing or occlusion of blood vessels, leading to ischemia and hypoxia or necrosis of the heart, causing chest pain, chest tightness and other symptoms. Clinically, coronary heart disease is categorized into chronic coronary artery disease and acute coronary syndrome according to the characteristics of onset and treatment principles. Chronic coronary artery disease includes ischemic cardiomyopathy, stable angina, occult coronary artery disease, etc. Acute coronary syndrome includes unstable angina, myocardial infarction, and sudden death of coronary artery disease. Chronic coronary artery disease can be stabilized by regulating blood lipids (atorvastatin), antiplatelet aggregation (aspirin), dilating coronary arteries (nitroglycerin) and other treatments, and coronary interventions are feasible when necessary, with a relatively good prognosis that is not serious. Acute coronary syndromes are more urgent and can lead to acute ischemic necrosis of the heart, with a higher mortality rate and more serious. The severity of coronary heart disease depends on the specific cause of the patient’s condition, and it is recommended to seek timely medical treatment and standardized treatment.