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Related Experiment Video

Updated: Jun 20, 2026

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

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Published on: December 11, 2017

Achieving permanent left ventricular pacing-options and choice.

Ernest W Lau1

  • 1Department of Cardiology, Royal Victoria Hospital, Belfast, UK. ernest.lau@btinternet.com

Pacing and Clinical Electrophysiology : PACE
|September 8, 2009
PubMed
Summary
This summary is machine-generated.

Cardiac resynchronization therapy (CRT) requires left ventricular (LV) pacing. Current lead placement methods face challenges, necessitating exploration of alternative LV pacing strategies for improved patient outcomes.

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Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Devices

Background:

  • Cardiac resynchronization therapy (CRT) relies on permanent left ventricular (LV) pacing.
  • Coronary sinus (CS) lead placement, the primary method, presents significant challenges including difficulty, high pacing thresholds, phrenic nerve stimulation, dislodgement, and less effective epicardial pacing.
  • Existing lead revision strategies have limitations, with potential for unusable side branches and high failure rates.

Purpose of the Study:

  • To review the limitations of current left ventricular (LV) lead placement in cardiac resynchronization therapy (CRT).
  • To highlight the challenges associated with coronary sinus (CS) lead placement and revision.
  • To underscore the need for novel LV pacing approaches to address anticipated clinical demand.

Main Methods:

  • Review of existing literature and clinical data on CRT lead placement and revision.
  • Analysis of limitations and failure rates associated with coronary sinus (CS) and surgical epicardial lead placements.
  • Examination of transseptal endocardial LV lead placement and associated risks.

Main Results:

  • Coronary sinus (CS) lead placement is associated with numerous complications and limitations, including lead dislodgement and unusable side branches post-extraction.
  • Surgical epicardial lead placement is invasive with a notable lead failure rate.
  • Transseptal endocardial LV pacing, while offering an alternative, carries unknown risks of systemic thromboembolism.

Conclusions:

  • Current LV pacing methods for CRT are suboptimal and face significant limitations.
  • A substantial number of patients undergoing CRT may require lead revisions or face challenges with lead replacement.
  • There is a critical need for the development and exploration of alternative, more effective, and safer LV pacing strategies for CRT.