ST-T changes, which is one of the most common changes on the ECG, are highly considered to be due to the occurrence of insufficient myocardial blood supply if the patient presents with ST-T changes. If the ST-segment is elevated arch-backwards or shifted downwards horizontally, it is considered possible to have an acute myocardial infarction. In addition to this, there may be non-specific ST-T changes, such as in people with premature repolarization syndrome, which are generally not of much clinical significance and are observed regularly. Others may have upward-sloping ST-segment elevation, which, in general, is considered to be possibly due to congenital changes or without any clinical significance and only requires regular observation. If you want to further clarify the diagnosis, it is recommended that the patient can undergo cardiac ultrasound and myocardial enzyme tests accordingly.