T-wave abnormalities are abnormal T waves on the ECG, which represent repolarization of the ventricles. abnormalities in T waves include low flatness, inversion, and hyperacusis of T waves. abnormalities in T waves can occur in various types of organic heart disease, cerebrovascular disease, electrolyte disorders, drug applications, and mental stress. abnormalities in T waves often need to be combined with clinically relevant symptoms, signs, and other laboratory tests. A comprehensive judgment is made. In patients with coronary artery disease, dynamic changes in T waves are often associated with abnormal blood supply to the myocardium. For electrolyte disorders, such as hyperkalemia and hypokalemia, T wave abnormalities are often seen, and electrolyte tests are needed to clarify the diagnosis.