Slow heartbeat may be caused by physiological factors, hypothyroidism, sinus node lesions, etc. According to different causes, different treatments are taken, including observation and follow-up, oral medication, surgery, and so on. 1. Physiological factors: healthy young people, athletes, and sleep may have a normal phenomenon of sinus bradycardia, although the heart beats slowly, usually no obvious clinical symptoms, without special treatment, only observation and follow-up. 2. Hypothyroidism: Hypothyroidism leads to a decrease in the secretion of thyroid hormone, causing the whole body to be in a low metabolic state, which leads to a slow heartbeat, and can be treated with exogenous thyroid hormone supplementation. 3. Sinus node lesions: the sinus node is the pacing point of the heart, when the sinus node lesions, its beating frequency slows down, resulting in a slow heartbeat, if necessary, can be surgically installed pacemaker treatment. Slow heartbeat can also be caused by severe hypoxia, hypothermia, intracranial diseases, etc. Patients should go to the hospital in time to improve the examination and give targeted treatment after clarifying the cause of the disease.