The treatment principle of second-degree type 1 AV block is that no treatment is needed for the time being when there are no symptoms, regular observation is needed, and pacemakers can be installed as soon as possible when there are obvious symptoms. If the ventricular rate of second-degree type 1 AV block is not too slow, most of them are asymptomatic and do not need treatment, and regular observation is enough; if it is found that the ventricular rate is obviously slowed down, accompanied by obvious symptoms (e.g., dizziness, darkness, angina, etc.) or hemodynamic disorders, it is necessary to install a pacemaker at an early stage. If the conditions for installing a pacemaker are temporarily unavailable, atropine or isoprenaline can be applied temporarily as an emergency to improve the heart rate and control symptoms, but long-term application of this drug is often ineffective and serious adverse effects have occurred. Therefore the drug is only indicated for emergencies in the absence of a pacemaker condition. Second-degree type 1 AV block should be promptly hospitalized and treated under medical supervision.