With the extensive and in-depth research on coronary heart disease by medical scientists, the disease is caused by a variety of factors acting on different links, these factors are susceptibility factors, usually called risk factors, mainly including the following aspects: Uncontrollable risk factors: 1, age: the disease is mostly seen in middle-aged and elderly people over 40 years old, and progresses faster after 49 years old, the onset of myocardial infarction and sudden death from coronary heart disease with age The onset of myocardial infarction and sudden coronary death is directly proportional to age, but in recent years, the onset of coronary heart disease has a tendency to be younger. 2, gender: in the United States, according to 1979 statistics, the incidence of coronary heart disease in white men aged 35 to 44 is 5.2 times that of women; in China, the incidence of coronary heart disease in men and women is about 2:1, but the incidence of coronary heart disease in women after menopause, due to the significant decline in estrogen levels, the incidence of coronary heart disease increased significantly. 3.Heredity: If there are people in the family who are prone to the disease at a young age, the chance of their close relatives getting the disease can be 5 times higher than that of the family without this condition. Risk factors that can be controlled: 1. Lipids: Abnormal lipids due to genetic factors, or excessive fat intake, or disorders of lipid metabolism. Such as total cholesterol, triglycerides, LDL, VLDL increased, while HDL decreased, prone to the disease. 2, blood pressure: elevated blood pressure is an independent risk factor for the development of coronary heart disease. The most common hazards caused by atherosclerosis due to elevated blood pressure are coronary arteries and cerebral arteries. Coronary artery atherosclerosis patients 60% to 70% have hypertension, hypertensive patients suffering from the disease is four times more than those with normal blood pressure. 3, smoking: many people think that smoking only causes respiratory disease, in fact, smoking is the main risk factor for coronary heart disease. Smokers compared with non-smokers, the morbidity and mortality of the disease increased by 2 to 6 times, and proportional to the number of cigarettes smoked per day. 4, diabetes: the fact that diabetes is prone to cardiovascular disease has been recognized. Some data show that the incidence of this disease in diabetic patients is two times that of non-diabetic patients, diabetes has now been classified as a coronary heart disease and other risks. Lifestyle habits: 1, diet: often eat a higher calorie diet, more animal fat, cholesterol susceptible to this disease. At the same time, a large amount of food is also susceptible to this disease, the world’s first obese countries – German researchers believe that “eating fat is because of eating more”, so to control the incidence of coronary heart disease, in addition to control high-fat diet intake, but also must pay attention to control the amount of food. 2, less physical activity, obesity: a retrospective survey of different occupations showed that the relative risk of coronary heart disease increased by 1.9 times in sedentary personnel than in active people. Research also shows that the occurrence of coronary heart disease also increases with the increase of body mass index, and the distribution of body fat also has a close relationship with the occurrence of coronary heart disease, especially abdominal obesity has a greater risk. Other factors such as occupation, mental workers than physical workers, often have a sense of urgency of the work is more likely to suffer from this disease.