QTc interval prolongation needs to pay attention to moderate exercise, weight control, light and reasonable diet, and also need to actively control the underlying diseases, such as hypertension, diabetes, and so on. QTc interval prolongation is a kind of electrocardiogram abnormality, which indicates that the heart repolarization is delayed. Patients who are in this state for a long time may suffer from heart failure, coronary artery disease, electrolyte disorders, rheumatic fever, etc., which are often induced by tachycardia, so they have to pay attention to exercise moderation on weekdays. Patients with underlying diseases, such as excessive weight with hypertension, diabetes, etc., need to actively control diet and weight control, in order to reduce the heart load, conducive to recovery. It is recommended to go to the cardiology department of the hospital in a timely manner, under the guidance of the doctor to improve the relevant examinations and standardized treatment, to eat a light diet, pay attention to rest, avoid staying up late.