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. 2023 Oct 31;10(11):448. doi: 10.3390/jcdd10110448

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Different capture patterns during LBBAP-CRT in a patient with non-ischemic cardiomyopathy and baseline wide QRS (panel (A)). During the procedure, LVSP (panel (B)), NS-LBBP (panel (C)) and S-LBBP (panel (D)) could be observed during unipolar pacing at different outputs. Bipolar pacing with AV Interval adjusted to favor intrinsic conduction through the RBB resulted in further QRS narrowing (panel (E)). Panels (F,G) show the final lead position in the LAO (40°) and RAO (35°) projections, respectively. COI: Current of injury; DF: Defibrillation; LB: Left bundle; LVSP: Left ventricular septal pacing; NS-LBBP: Non-selective left bundle branch pacing; S-LBBP: Selective left bundle branch pacing. Sweep speed 100 mm/s.