Related Experiment Video

Updated: Jun 9, 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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Left Bundle Branch Block-associated Cardiomyopathy: A New Approach

Shunmuga Sundaram Ponnusamy1, Pugazhendhi Vijayaraman2, Kenneth A Ellenbogen3

  • 1Department of Cardiology, Velammal Medical College Madurai, India.

Arrhythmia & Electrophysiology Review
|October 25, 2024
PubMed

Insights

Left bundle branch block (LBBB) often indicates heart disease. For LBBB-associated cardiomyopathy, conduction system pacing, like left bundle branch pacing, shows promise for reversing heart remodeling and improving outcomes.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Heart Failure

Background:

  • Left bundle branch block (LBBB) is linked to structural heart disease, increased morbidity, and mortality.
  • Current guidelines suggest cardiac resynchronisation therapy (CRT) for cardiomyopathy with LBBB after 3 months of medical therapy.
  • Medical therapy alone may be less effective, with most patients eventually requiring CRT.

Purpose of the Study:

  • To review the mechanisms, evidence, and role of conduction system pacing in LBBB-associated cardiomyopathy.
  • To highlight LBBB-associated cardiomyopathy as a potentially reversible condition.
  • To discuss left bundle branch pacing as a CRT strategy.

Main Methods:

  • Review of published literature on LBBB-associated cardiomyopathy and conduction system pacing.
  • Analysis of clinical trial data regarding CRT efficacy in LBBB patients.
  • Examination of reverse remodeling outcomes following left bundle branch pacing.

Main Results:

  • CRT has demonstrated favorable clinical outcomes in patients with LBBB.
  • Left bundle branch pacing can lead to significant reverse remodeling in LBBB-associated cardiomyopathy.
  • Conduction system pacing offers a potential alternative CRT approach.

Conclusions:

  • LBBB-associated cardiomyopathy may be reversible with appropriate pacing.
  • Left bundle branch pacing is an effective strategy for CRT in selected patients.
  • Conduction system pacing represents a valuable tool in managing heart failure with LBBB.

Keywords:
Left bundle branch blocklate gadolinium enhancementleft bundle branch block-associated cardiomyopathyleft bundle branch block-induced cardiomyopathyleft bundle branch pacing

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