T-wave hyperacusis has to be differentiated in the context of the clinical situation, either as a normal variant or as an electrolyte disorder or early change in myocardial infarction. t-wave is a repolarization wave for ECG, and ECG also has characteristic performance for repolarization wave. The normal T wave has a certain height, in the thoracic and limb leads requires more than 1/8 or 1/10 of the R wave. if the super is very high, it shows as T wave hyperacusis, the clinical significance of T wave hyperacusis should be treated differently, for young people or children with thin chest wall, it can show T wave hyperacusis. There is also a part seen in an abnormal condition, pathological condition, in the hyperacute phase of early infarction manifested by T-wave hyperacusis, which is the hyperacute phase of acute myocardial infarction. There is also a manifestation of hyperkalemia, which manifests as a tent-like T-wave hyperacusis, and electrolyte disorders that also manifest as T-wave hyperacusis.