Bradycardia is categorized into sinus bradycardia and atrioventricular block. Physiological sinus bradycardia does not require treatment, while pathologic sinus bradycardia and atrioventricular block need to be treated with drugs such as atropine and isoprenaline according to the condition. 1. Physiological sinus bradycardia: in normal people in sleep or quiet state, the heart rate of long-term physical laborers or athletes can be less than 60 times/minute, which is the performance of the heart’s strong pumping function, and does not need treatment. 2. Pathological sinus bradycardia: the main causes are sinus node function damage, such as surgical injury and pathological sinus node syndrome; electrolyte disorders, such as hyperkalemia, etc.; vagal hyperexcitability, such as compression of the eyeballs, carotid sinus pressure, brain diseases, etc.. It is necessary to actively treat the primary disease, and at the same time use atropine, isoproterenol and so on to maintain the heart rate, if necessary, use pacemaker treatment. 3. Atrioventricular block: 1st degree atrioventricular block is usually asymptomatic and does not require treatment, while 2nd and 3rd degree atrioventricular block require pacemaker treatment as early as possible while maintaining the heart rate with medication. Patients with bradycardia must go to the hospital in time, after clarifying the cause of bradycardia in the guidance of specialists to choose the appropriate treatment program.