Slow heartbeat can cause symptoms of insufficient blood supply to the heart, such as weakness, chest tightness, chest pain, and shortness of breath. The cause may be sick sinus node syndrome, hypothyroidism, myocarditis, atrioventricular block, myocardial ischemia and other diseases, patients can take medication, surgery. 1. Morbid sinus node syndrome: patients can follow the doctor’s prescription oral scopolamine tablets, atropine sulfate tablets and other anticholinergic drugs. If the patient’s symptoms are serious, the patient can take surgery to install pacemaker treatment. 2. Hypothyroidism: patients can take oral levothyroxine sodium tablets, dry thyroid tablets and other thyroid hormone supplementation drugs as prescribed by the doctor, and pay attention to monitoring the blood thyroxine level. 3. Myocarditis: myocarditis will lead to cardiac arrest, palpitation, shortness of breath and other symptoms, patients can follow the doctor’s instructions to inject sodium creatine phosphate injection, coenzyme Q10 injection and other drugs to improve myocardial energy metabolism, if necessary, can be applied to high-dose hormone therapy. 4. Atrioventricular block: For slow heartbeat caused by atrioventricular block and insufficient blood supply to the heart, patients can follow the doctor’s instructions to use isoprenaline hydrochloride injection, atropine sulfate injection and other drugs. Patients can also take surgical treatment, such as permanent pacemaker implantation and other surgical methods. 5. Myocardial ischemia: patients can take oral nitroglycerin tablets, isosorbide mononitrate tablets and other nitrate drugs, and at the same time, follow the doctor’s instructions for the application of aspirin enteric-coated tablets, clopidogrel hydrogencarbamate tablets, statin and other secondary prophylactic drugs, and if necessary, accept coronary stenting, coronary artery bypass grafting and other surgical methods. Patients with symptoms of insufficient blood supply to the heart with a slow heartbeat should seek medical attention in time to identify the cause of the disease and receive medication or surgical treatment under the guidance of a doctor.