If the patient has recently developed a rapid heartbeat, it is possible that the abnormalities may be due to the development of electrolyte disorders or hyperthyroidism, or may be triggered by insufficient blood supply to the myocardium. To further clarify the diagnosis, it is suggested that the patient can have an electrocardiogram, serum electrolytes and thyroid function tests. If the patient has not been eating well recently, it cannot be excluded that it may be caused by anemia, and it is also possible to check the blood routine, and cardiac ultrasound and dynamic electrocardiogram if necessary. It is recommended that patients can take oral beta-blockers to improve the situation of fast heartbeat, representative drugs mainly include bisoprolol, metoprolol. However, when the patient’s heartbeat is fast, it is necessary to measure the actual heart rate and blood pressure, which will help to further clarify the diagnosis and understand the patient’s actual condition.