The Impact of LBBAP vs RVP on the Incidence of New-onset Atrial Fibrillation in Patients With Atrioventricular Block

Inclusion criteria

• Adult patients aged 18-85;
• AV block patients with ventricular pacing indications and the expected rate of ventricular pacing(VP)> 40%, including (a) third-degree AV block; (b) second degree AV block (type II); (c) intermittent advanced AV block with expected VP>40%; (d) symptomatic first degree AV block and PR interval on ECG > 300ms;
• Signed informed consent;

Exclusion criteria

• Baseline echocardiographic assessment of patients with impaired LV function (LVEF<50%);
• Patients with the history of atrial fibrillation;
• Having difficulties in follow-up: Those who cannot accept 2-year follow-up on time due to physical condition or other reasons;
• Pacemaker replacement without new implanted ventricular electrodes;
• Surgery is required within 1 year due to severe structural heart disease;
• Patients with tricuspid mechanical valve replacement, or congenital heart disease (including transposition of the great arteries, or permanent left superior vena cava, etc);
• AV block resulting from: (a) Hypertrophic cardiomyopathy(HCM), (b) ventricular septal defect repair, and those who are unlikely to achieve successful LBBAP procedure.