If the patient often has an accelerated heartbeat, the condition may be due to hyperthyroidism or anemia, or may be caused by hypokalemia, or some patients may have severe stenosis of the coronary vessels, which may lead to an accelerated heartbeat during myocardial ischemia. It is recommended to check the blood routine, serum ion and thyroid function, and also to do an ambulatory electrocardiogram. If the patient has high risk factors for coronary artery disease, a coronary CT or even a coronary angiography should be performed to further clarify the diagnosis. In other patients, it is also possible to have a rapid heartbeat due to the presence of psychosomatic disorders, such as anxiety and depression, and during insomnia.