Do you know about coronary heart disease? The name of coronary heart disease, full name coronary atherosclerotic heart disease, synonymous with coronary artery heart disease, generally refers to atherosclerosis of the coronary arteries. Coronary artery atherosclerotic heart disease is a heart disease caused by atherosclerotic lesions in the coronary arteries that narrow or block the lumen of the blood vessels, resulting in ischemia, hypoxia or necrosis of the myocardium, often referred to as “coronary heart disease”. Coronary artery disease may be broader in scope and include inflammation, embolism, trauma, etc. that cause narrowing or occlusion of the lumen. The World Health Organization classifies coronary artery disease into five major categories: 1, asymptomatic myocardial ischemia (occult coronary artery disease). 2, angina pectoris. 3, myocardial infarction. 4, ischemic heart failure (ischemic heart disease). 5, sudden death, these 5 clinical types. In the clinic is divided into stable coronary heart disease and acute coronary syndrome (ACS for short). Doctors in order to faster and better, more accurate, more rapid treatment of patients, the clinical subdivision into non-ST-segment elevation myocardial infarction and ST-segment elevation myocardial infarction, the disadvantages of which can not clearly indicate the site of infarction, can only indicate that the myocardium has necrosis and the degree of difference in treatment is divided into light and heavy priority.