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Related Experiment Video

Updated: Mar 10, 2026

Optimization of Radiochemical Reactions using Droplet Arrays
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Optimizing CRT - Do We Need More Leads and Delivery Methods.

Pieter Martens1, Frederik Hendrik Verbrugge2, Wilfried Mullens3

  • 1Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium.

Journal of Atrial Fibrillation
|December 14, 2016
PubMed
Summary

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Cardiac resynchronization therapy (CRT) improves heart failure outcomes by optimizing left ventricular (LV) electrical activation. Personalized lead placement and advanced pacing strategies enhance CRT effectiveness and patient quality of life.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Heart Failure Management

Background:

  • Cardiac resynchronization therapy (CRT) is established for symptomatic heart failure with reduced ejection fraction and left ventricular (LV) conduction delay (QRS ≥120 ms), particularly with left bundle branch block (LBBB).
  • CRT aims to restore normal LV electrical activation, but heterogeneity in activation patterns necessitates individualized lead placement to avoid scar tissue and target latest activation sites.
  • Limitations in coronary sinus anatomy can hinder optimal LV lead placement, prompting exploration of epicardial or transseptal approaches, despite increased risks.

Approach:

  • Utilizing echocardiography, electroanatomic mapping, and cardiac MRI with late gadolinium enhancement to guide precise LV lead placement.
  • Investigating LV-only pacing algorithms for patients with preserved atrioventricular (AV) conduction and LBBB.

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  • Exploring multisite pacing, including multipolar LV leads, to address electrical dispersion and improve CRT response.

    • Key Points:

    • Individualized LV lead placement targeting latest electrical activation and avoiding scar tissue can enhance CRT response.
    • Multisite pacing, especially with multipolar LV leads, shows promise for improving resynchronization and reverse remodeling.
    • Dedicated multidisciplinary post-implantation care is crucial for optimizing CRT delivery and improving patient outcomes.

    Conclusions:

    • Optimizing LV lead placement and pacing strategies are key to maximizing CRT benefits in heart failure patients.
    • Multipolar LV leads offer a potential advantage for achieving effective resynchronization without additional leads.
    • Dedicated CRT clinics and post-implantation care are essential for ensuring effective therapy and improving patient response rates.