Transcatheter ablation of the atrioventricular junction in refractory atrial fibrillation: A clinicopathological study

•Catheter ablation of the AVJ with a right-side approach is an effective therapy for refractory atrial fibrillation•The ideal site for ablation of the specialized AVJ is the AV node to preserve the automaticity distal to the site of interruption thus preventing PM dependence.•In cases with unsuccessful AV node ablation, a shift towards the His bundle is needed.•A continuity between the septal and anterior leaflets of the tricuspid valve may protect the His bundle as to require multiple shocks and prolong the procedure.