There are many causes of rapid heartbeat in the elderly, which can be simply divided into the following three categories. First, sinus tachycardia. For this type of patients, it is important to actively search for causes as well as triggers, such as hyperthyroidism, heart failure, or other organic diseases. If the patient has unexplained sinus tachycardia and the clinical symptoms are not very obvious, it is recommended to avoid staying up late, avoiding colds and emotional excitement in lifestyle. Usually try to drink less drinks and other easily excitable drinks. Second, atrial tachycardia, atrial fibrillation, atrial flutter can also cause rapid heartbeat, but also to exclude organic disease caused by such patients often combined with clinical symptoms. Third, ventricular tachycardia. This type of patient is very rare and often combined with hemodynamic instability, and should be actively given to restore the sinus rhythm, and if necessary, need to give electric defibrillation. So depending on the type of heart disease and the severity of the arrhythmia, tachycardia can occur.