When it comes to coronary heart disease, everyone has more or less heard a little bit about it, but what they know is only some fragmentary information. In the outpatient clinic, often encountered some patients with chest pain, they are very anxious to ask whether their symptoms are due to coronary heart disease. In fact, the initial judgment is not coronary heart disease mainly depends on the following aspects: Typical angina symptoms 1. location Usually located in the back of the sternum or the left anterior chest, a few can be located in the pharynx, epigastric region, jaw and other parts of the body, each episode of the site is usually constant; 2. nature Usually for the heavy weight of the pressure-like, squeezing feeling, tightness, girdle feeling and other dull pain nature, some patients manifested as a choking sensation, usually not a needle prick-like, Duration: usually a few minutes, not only a few seconds, if the typical symptoms last more than 15 minutes, should be considered to exclude the possibility of myocardial infarction; 4. Triggering cause: usually occurs at the time of physical activity or emotional fluctuations, and does not usually occur after a long period of labor in the stopping of the rest of the symptom; 5. Relief: relieved by stopping the activity, can be relieved by rest, containing nitroglycerin quickly relieved, or after a short period of rest, or after a long period of labor, can be relieved by stopping the activity or rest, or after taking nitroglycerin. The symptoms may be relieved after stopping activity or resting, and may be relieved quickly after taking nitroglycerin, but generally do not appear to be relieved in 10 minutes or so after taking nitroglycerin. 6. Site of radiation The symptoms may be felt in the left shoulder, the left back, or the left upper extremity at the same time as the chest discomfort. 7. Accompanying symptoms In severe cases, the symptoms may be accompanied by sweating. The symptoms of myocardial infarction are similar in nature to those of angina pectoris, but are much more severe, persistent and unrelieved, and may be accompanied by sweating, nausea, and a sense of near death. Electrocardiographic features of angina pectoris The typical electrocardiographic manifestations of myocardial ischemia are horizontal or downward-sloping downward shift of the ST-segment and inversion of the T-wave at the onset of symptoms, which rapidly return to normal after the symptoms are relieved. The main point is that the ECG changes are closely related to the symptoms, if the physical examination of the ECG has “ST-T changes” but not related to the symptoms and long-term dynamic changes, then there is no diagnostic value. Risk factors Risk factors for coronary heart disease include: men over middle age, postmenopausal women, hypertension, lipid metabolism disorders, diabetes mellitus, obesity, low physical activity, smoking, family history of premature atherosclerosis, hyperhomocysteinemia, etc. The risk group for coronary heart disease is defined as those who have a high risk of developing coronary heart disease. People at high risk for coronary heart disease are those who have multiple risk factors at the same time. If a person is at high risk and has typical symptoms, the diagnosis is more accurate. Doctors suggest that people with typical symptoms of coronary heart disease should go to the hospital in time for consultation and timely diagnosis. People with atypical symptoms of coronary heart disease should also see a doctor as long as their symptoms are closely related to physical activity. High-risk groups can go to the hospital regularly for cardiology examination.