Coronary atherosclerosis and impaired balance of myocardial oxygen supply and demand are the causes, and any disease that can cause ischemia and hypoxia in the heart can cause angina pectoris. Angina pectoris is a clinical syndrome with episodes of chest pain or chest discomfort as the main manifestation caused by acute, temporary ischemia and hypoxia of the myocardium due to insufficient blood supply to the coronary arteries. Several points leading to myocardial ischemia are the causes of angina pectoris. Causes of angina pectoris I. Coronary atherosclerosis Hypertension, hyperlipidemia, diabetes and smoking and other factors make some components of blood lipids deposited in the arterial walls, forming atheromatous plaques, so that the lumen narrowing. When the stenosis exceeds 70%, blood flow decreases and myocardial tissue becomes ischemic, leading to angina pectoris. Causes of angina pectoris II, myocardial oxygen supply and demand balance disorder When physical activity and other reasons need to increase the workload of the heart, the coronary arteries can not be corresponding expansion, resulting in myocardial ischemia caused by angina pectoris, that is, when the heart oxygen supply and demand balance disorder may lead to angina pectoris attack. Causes of angina pectoris three, coronary artery spasm The human body can regulate and control the blood supply to the myocardium through a number of neurological and humoral factors. Diseases and certain causes of life can cause spastic contraction of the coronary arteries and sudden narrowing of the lumen, resulting in a temporary lack of blood supply to the myocardium and angina. There are also many indirect causes of angina pectoris in daily life, such as neuropsychiatric factors, emotional changes, anxiety and grief, all of which can induce angina pectoris. In addition, hypertension and hyperlipidemia, diabetes, as well as excessive physical labor, strenuous exercise, is also the cause of angina pectoris. The daily health care points of angina 1, daily life, angina patients should pay attention to rest, usually patients should also pay attention to the combination of work and rest, to ensure adequate sleep. 2, angina patients should pay attention to abstain from intercourse, especially during the attack should pay more attention, so as not to cause unpredictable and even life-threatening due to overexcitement. 3, in life, angina patients should pay attention to be open-minded and take everything in stride. Do not be for a little thing, and a big anger, to maintain a good mood and mentality. 4, adhere to the appropriate physical exercise exercise for heart disease benefits far outweigh the harm, while experts point out that angina patients exercise according to their specific conditions, within their capabilities, moderate amount of exercise. 5, according to medical research shows that the risk of myocardial infarction and sudden death is two times higher in smokers than in nonsmokers. It can be seen, smoking for patients suffering from heart disease, the harm is undoubtedly large, therefore, smoke when quit is indisputable. 6, people with angina should pay attention to diet, do not eat meat every day, should eat less fat, cholesterol-rich food, try to control the intake of sugar, eat more fruits and vegetables, eat more fish, can drink milk.