There is no optimal treatment for second degree AV block. Different treatments need to be taken according to different causes, such as physiologic factors, myocarditis and myocardial infarction, which can be treated by general treatment, medication and pacemaker. 1. Physiologic factors: Second-degree type I AV block is a slow-onset arrhythmia that can be caused by sympathetic overexcitation or increased vagal tone. It can occur in healthy people as well as muscular athletes, and is physiologic in nature. This condition can be left untreated if there are no symptoms. 2. Myocarditis: It mainly occurs in young people or adolescents, and is preceded by bacterial or viral infections, causing damage to the AV node function, which in turn causes second-degree type II AV block. Bed rest should be used to reduce the burden on the heart and tissue damage. Or follow the doctor’s instructions to take nutritive cardiac drugs for treatment, such as trimetazidine tablets, to ease the discomfort. 3. Myocardial infarction: In patients with anterior myocardial infarction, ischemia and hypoxia of the anterior wall of the heart will affect the transmission of atrial excitation to the ventricle, resulting in complete or incomplete blockage, thus causing second-degree AV block. Stents can be placed to improve the blood supply to the heart, as well as medications such as metoprolol tablets to reduce myocardial oxygen consumption and improve the imbalance between oxygen supply and demand in the ischemic area. There are other diseases that can cause second-degree AV block, and patients should go to the hospital in a timely manner to get a clear picture of the cause of the disease and then follow the doctor’s instructions for targeted treatment.