Sinus tachycardia T-wave changes may be due to physiological and pathological factors (such as coronary atherosclerosis, myocardial infarction, etc.), and the treatment measures include improvement of lifestyle habits, taking aspirin, metoprolol and other medications as prescribed by the doctor, and surgical treatment if necessary. 1. Physiological factors: mostly related to increased sympathetic excitability, commonly seen after exercise, drinking coffee or strong tea, emotional excitement, and staying up all night, etc. Part of the population will experience hyperventilation, sympathetic excitability, sinus tachycardia, and electrocardiograms may show T-wave changes. Adopting good living habits and avoiding emotional excitement can improve sinus tachycardia T-wave changes. 2. Coronary artery atherosclerosis: it can cause narrowing of the coronary arteries in human body, when narrowing, the coronary arteries of human body to reduce the blood supply to the human heart, thus myocardial ischemia occurs. When myocardial ischemia occurs, sinus tachycardia and T-wave changes will occur. This can be treated with aspirin, which inhibits platelet aggregation and prevents the formation of blood clots, thus helping to prevent the progression of stenosis, which in turn improves sinus tachycardia and T-wave changes. At the same time, drugs such as metoprolol can be used to reduce the heart rate. 3. Myocardial infarction: mainly due to the occlusion of the main blood vessels supplying blood flow to the heart, blood flow is interrupted, thus leading to ischemic necrosis of the heart muscle, which can lead to sinus tachycardia and T-wave changes. Severe cases can be treated with interventional or bypass surgery. If a patient has sinus tachycardia T-wave changes, it is recommended to go to the hospital in time to find out the cause of the problem.