Related Experiment Video

Updated: Jul 26, 2025

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
12:45

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Published on: December 11, 2017

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A shorter R wave peak time in left bundle branch pacing may not be a marker of more physiological ventricular

Yuelin Zhang1, Longfu Jiang1, Jiabo Shen1

  • 1Department of Cardiology, Ningbo No. 2 Hospital, Ningbo, China.

Pacing and Clinical Electrophysiology : PACE
|June 16, 2023
PubMed

Insights

Left bundle branch pacing (LBBp) offers a new cardiac resynchronization therapy. Pacing the left posterior fascicle (LPF) may dominate left ventricular activation, providing an alternative when LBBp is not feasible.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Pacing

Background:

  • Left bundle branch pacing (LBBp) is an emerging alternative to biventricular pacing for cardiac resynchronization therapy.
  • Understanding fascicular dominance in LBBp is crucial for optimizing pacing strategies.
  • The left anterior fascicle (LAF) and left posterior fascicle (LPF) have distinct anatomical distributions and potential roles in ventricular activation.

Observation:

  • A case study of a 76-year-old male patient who underwent LBBp implantation is presented.
  • The study investigates the pattern of left ventricular activation following LBBp.
  • The specific fascicle targeted during LBBp implantation was not explicitly stated but implied to be LPF based on the findings.

Findings:

  • Left ventricular activation appears to be dominated by the left posterior fascicle (LPF) during LBBp.
  • This finding suggests that LPF pacing may be a viable strategy for achieving cardiac resynchronization.
  • The study proposes LPF pacing as a potential alternative when standard LBBp is not achievable or optimal.

Implications:

  • The findings suggest a potential shift in LBBp techniques, focusing on LPF activation.
  • LPF pacing could offer a valuable alternative for patients who are not candidates for or do not benefit from conventional LBBp.
  • Further research is warranted to confirm LPF dominance and its clinical efficacy in a broader patient population.

Keywords:
R wave peak timeleft anterior fascicleleft bundle branch pacingleft posterior fascicleleft ventricular activation

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