Introduction
Since its first description1 , selective and non-selective His-bundle pacing (HBP) has proven to be a feasible and safe procedure, with morbidity and mortality outcomes comparable or superior to those of conventional endocardial right-ventricular pacing.2,3 It has also achieved excellent outcomes in candidates for cardiac resynchronization therapy (CRT).4,5 Nevertheless, well-documented limitations of HBP include a long learning curve, higher energy requirement, greater radiological exposure, and the possible need for reintervention due to lead-related complications.6 In addition, the success rate of this procedure is lower in patients with interventricular conduction defects, because branches of the His-Punkinje system cannot be recruited when the block zone is more distal from the pacing point.7
Left bundle branch area pacing (LBBAP), in which the lead penetrates into the interventricular septum, is a feasible and safe alternative option in candidates for antibradycardia therapy (ABT) or CRT and has also obtained similar or better outcomes in comparison to conventional pacing.8,9 However, no studies have been published that compare results between these two techniques. The objective of the present study was to compare outcomes between HBP and LBBAP at implantation and at 3 months.