Chronic coronary syndromes are mainly characterized by chest pain, and acute coronary syndromes are also characterized by systemic symptoms, heart failure, and shock. 1. Chronic coronary syndromes include stable angina, insidious coronary artery disease, and ischemic cardiomyopathy. (1) Stable angina pectoris is mainly manifested as episodic chest pain, which can be triggered by labor, emotional excitement, etc. Chest pain is mostly compressive, located in the back of the sternum or radiating to the left upper limb, and most of them do not last more than 30 minutes. (2) Hidden coronary artery disease has no angina symptoms. (3) Ischemic cardiomyopathy may have arrhythmia, heart failure, thrombosis and other symptoms in addition to angina. 2. Unstable angina in acute coronary syndrome manifests itself as a more severe degree of angina that can occur at rest. Myocardial infarction manifests itself as angina that occurs at rest and can be located in the retrosternal, epigastric, or toothache, and can also have symptoms such as fever, nausea and vomiting, as well as weakness, dizziness, fainting caused by arrhythmia and low blood pressure, and even heart failure leading to dyspnea. Coronary syndrome is a group of diseases collectively, with chest pain as the prominent clinical manifestation, because of the different treatment modalities of various diseases, so need to actively consult the doctor, according to the doctor’s instructions for treatment.