ST-T changes are an electrocardiographic phenomenon that may cause ST-T changes whenever the myocardial repolarization is affected. ST-T changes can occur in patients with electrolyte disorders, such as high potassium and low potassium; 4, ST-T changes can occur in patients with early repolarization syndrome; 5, T wave abnormalities can occur in patients with cerebrovascular accidents; 6, various ion channel diseases can also lead to ST-T changes; 7, secondary ST-T changes, such as myocardial hypertrophy, complete left bundle branch block, complete right bundle branch block, and subsequent ST-T alterations.