Elevated st-segment on ECG is important. The st segment on the electrocardiogram represents the process of slow repolarization of the ventricle, acute myocardial ischemia and myocardial infarction will cause the st segment to be elevated, the patient if accompanied by palpitations (rapid heartbeat, often accompanied by panic), shortness of breath, irritability, angina pectoris, etc., suspected coronary artery disease, need to be timely examination, because it is more dangerous. The st segment elevation is not only seen in acute myocardial infarction, but also in variant angina pectoris, acute pericarditis, acute pulmonary embolism, aortic coarctation, acute myocarditis, hyperkalemia and so on, and it should be identified according to the history and symptoms, which are more dangerous. In case of abnormal ECG findings, it is recommended to seek prompt medical attention to clarify the cause of the disease with the help of a doctor and to provide targeted management or treatment.