ST-T changes are a manifestation of an ECG that is an abnormal ECG. It usually suggests the possibility that the patient may have insufficient blood supply to the myocardium. However, further cardiac examination is needed to clarify the cause of the disease. ST-T changes are a very common way of describing ST segment and t-wave changes on the ECG, which include a variety of changes such as elevation or depression of the ST segments, as well as bi-directional t-wave changes. ST-T segment changes mean that the patient may have insufficient blood supply to the myocardium, and if the patient has ST segment elevation, he may have an acute myocardial infarction, which requires active further improvement of myocardial enzymes, and coronary angiography if necessary. If there is ST segment depression, accompanied by t-wave inversion, there may be myocardial ischemia, stenosis of blood vessels, if the patient is accompanied by intermittent symptoms of chest tightness and chest pain, then angina pectoris should be considered. If the patient has hypertension for many years and the blood pressure control is not satisfactory, such ST-T changes should also be considered to be caused by myocardial hypertrophy with strain. Therefore, ST-T segment changes are a kind of indication on the electrocardiogram, and the specific cause of the disease needs to be further perfected with cardiac related examinations to be able to make a clear diagnosis. It is recommended that patients with ST-T segment changes should consult a doctor in time, and combined with the accompanying symptoms of the patient, further examination should be carried out to clarify the specific cause of the disease and then systematic treatment.