Is the pacing site closer to the left ventricular septal endocardium in left bundle branch pacing or in left ventricular septal pacing? - Peng XY; Wang YJ; Sun LL; Shi L; Cheng CD; Huang LH; Tian Y; Liu XP (Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing, 2023)