Figure 3.
Comparison of 3-dimensional echocardiogram between selective His bundle pacing (HBP) and left bundle branch pacing (LBBP). A: The pacing lead position (the site of LBBP near the sub-endocardium of the left side of the ventricular septum, the HBP site near the tricuspid valve annulus). LV = left ventricle; RV = right ventricle. B–D: Parametric imaging of LV in real-time 3-dimensional echocardiography analysis: B: intrinsic rhythm; C: HBP in DDD mode with sensed atrioventricular (SAV) delay 100 ms; D: LBBP in DDD mode with SAV 110 ms.