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. 2019 Oct 18;6(6):293–296. doi: 10.1016/j.hrcr.2019.10.007

Figure 2.

Figure 2

Comparison of electrocardiogram between selective His bundle pacing (HBP) and left bundle branch pacing (LBBP) after procedure. A: Intrinsic rhythm with QRS duration (QRSd) of 169 ms. B: Selective HBP at threshold of 0.75 V / 0.4 ms with QRSd of 169 ms. C: Selective HBP at left bundle branch block (LBBB) correction threshold of 1.25 V / 0.4 ms with QRSd of 106 ms. D: HBP in DDD mode with sensed atrioventricular (SAV) delay 100 ms, with QRSd of 107 ms. E: LBBP at 0.5 V / 0.4 ms with QRSd of 127 ms and right bundle branch conduction delay pattern. F: LBBP in DDD mode with SAV delay 110 ms, with QRSd of 108 ms.