Bradyarrhythmias

At present, cardiac pacing has been widely used in the treatment of bradyarrhythmias and heart failure, which can effectively improve the survival rate of patients. With the rapid development of technology, different sites can be chosen to pace, such as right atrial appendage, the atrial septum and the right atrial wall in the atrium, His bundle, left bundle branch area, right ventricular apex, outflow tract, and left ventricular pacing via coronary vein in the ventricle. There are few studies comparing the long-term efficacy and safety of different pacing sites in daily practice. This study aims to observe the efficacy and safety of cardiac pacing at different sites in short and long term, and to compare the advantages and disadvantages of pacing at different sites.