Sudden rapid heartbeat and sweating in the middle of the night may be caused by hyperthyroidism, myocarditis or myocardial infarction, depending on the cause of the disease, different treatment programs can be taken. 1. Hyperthyroidism: Hyperthyroidism is an endocrine disease caused by overproduction of thyroid hormones and hypermetabolism. After diagnosis, you can take medicines such as methionine, methimazole, carbimazole and so on under the guidance of your doctor for treatment. In addition, radioactive iodine treatment or surgery can also be chosen. 2. Myocarditis: Myocarditis is an inflammation of the heart muscle cells, and patients often have palpitations, chest tightness and other symptoms. It can be treated with coenzyme Q10, trimetazidine and other nutritive drugs under doctor’s guidance, and if necessary, a pacemaker can be installed or cardiopulmonary support therapy can be carried out. 3. Myocardial infarction: if the patient in the middle of the night in the coronary artery acute occlusion, resulting in myocardial necrosis, there will be a rapid heartbeat sweating and other symptoms, but also accompanied by chest pain and other typical performance. Nitroglycerin can be taken during the acute attack, and if necessary, the patient can be treated by stent implantation or bypass grafting. There are many causes of sudden rapid heartbeat and sweating in the middle of the night, and it is recommended that the patient go to the hospital in time to find out the cause of the disease and then treat the symptoms.