How to treat atrioventricular block?

Second degree atrioventricular block is a dangerous arrhythmia. Its treatment principles are as follows: 1. The corresponding primary disease should be treated according to its different causes. 2. When the patient's symptoms are obvious, drug treatment can be considered: atropine can increase the heart rate of atrioventricular block, which is suitable for patients with block occurring in atrioventricular node. Isoproterenol is suitable for atrioventricular block in any position, but it should be used cautiously in acute myocardial infarction, because it may cause severe ventricular arrhythmia. For acute myocardial infarction with second degree atrioventricular block but QRS complex is not wide, the ventricular rate of 45~50 beats/min can be closely observed; but when the ventricular rate is lower than 40 beats/min and the frequency is unstable or accompanied by hypotension, isoproterenol can be tried. For patients with QRS complex wide deformity, high vigilance should be given to the development of high or third degree atrioventricular block. 3. Temporary cardiac pacemaker or permanent cardiac pacemaker should be implanted if necessary: For example, pacing can be used when complicated with angina pectoris, heart failure or shock.