The common types of coronary heart disease include angina pectoris and myocardial infarction. Due to a domestic translation error in the early years, it was translated as “angina pectoris”, but in fact the English word does not mean “angina”, and the nature of angina symptoms is not angina, and angina pectoris is generally not angina. Because many patients have misconceptions about angina, some of the more typical symptoms of angina are often overlooked, and this leads to delays in diagnosis and treatment. Therefore, it is important to better understand the characteristics of angina pectoris (especially typical angina pectoris). It has been found that among ischemic chest pains, typical angina is manifested and the rest is atypical chest pain. According to the “five elements” of angina pectoris symptoms, the clinical characteristics of typical angina pectoris can be summarized as follows: 1, pain site and range: for the anterior chest area (i.e., behind the upper or middle part of the sternal body), often accompanied by left shoulder, neck, arm radiating pain. The range of pain in the precordial region is generally the size of the palm of your hand, and is generally not very limited to a certain point of pain. 2. Nature of pain: Multiple crush-like pain, pressure, boredom or tightness, often accompanied by anxiety or near-death fear. Usually it is not pins and needles pain or throbbing pain. It is not “colic”, “grasping pain”, “cutting pain”, “sharp pain”, “pins and needles pain” or “painful” pain. It is not “colic”, “scratching pain”, “cutting pain”, “sharp pain”, “pins and needles pain” or “electric shock-like pain”. If the attack occurs during activity, the patient often needs to stop and rest. If the pain is tossing and turning and tossing, it is usually not angina. If the pain is accompanied by pressure, it is generally not angina. 3. duration: more than a few minutes or more than ten minutes, generally not more than half an hour. If the pain lasts for more than a few hours or days, or if the pain lasts for only a few seconds, it is not angina pectoris. 4, relief mode: most patients can be relieved within a few minutes after rest, or within a few minutes after taking nitroglycerin or heart pills. However, it is worth noting that some patients with chest pain without active coronary heart disease will also have some relief of chest pain symptoms after taking nitroglycerin. 5. Triggers: It usually occurs during physical activity (such as forceful defecation, fast going upstairs, heavy lifting, climbing or physical labor), emotional excitement, cold, and full meal. It can also occur at rest, at night or when sleeping in the prone position. Patients who have chest pain of unknown origin are asked to compare their symptom characteristics with the above “five elements” of typical angina pectoris and see which of them they match? If the symptoms basically match with the above characteristics, you should pay enough attention and seek medical consultation as soon as possible. Even if only some of the characteristics match, you should consult a specialist to make a comprehensive analysis and decide whether further tests are needed.