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Relation between abnormal ventricular impulse conduction and heart failure.

Kevin Vernooy1, Xander A A M Verbeek, Maaike Peschar

  • 1Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, the Netherlands.

Journal of Interventional Cardiology
|November 25, 2003
PubMed
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Ventricular pacing and left bundle branch block (LBBB) cause asynchronous ventricular activation, impairing cardiac pump function. This electrical dyssynchrony is increasingly linked to heart failure development.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Physiology

Background:

  • Ventricular pacing and left bundle branch block (LBBB) are common causes of asynchronous ventricular electrical activation.
  • The sequence of ventricular activation significantly impacts cardiac pump function.
  • The activation sequence during LBBB closely resembles that of conventional RV apex pacing.

Purpose of the Study:

  • To review the literature on the effects of RV pacing and LBBB on cardiac function.
  • To discuss the long-term adaptations (remodeling) associated with these conditions.
  • To evaluate the contribution of asynchronous electrical activation to heart failure development.

Main Methods:

  • Literature review and synthesis of existing studies.
  • Analysis of regional and global left ventricular (LV) pump function.

Related Experiment Videos

  • Examination of long-term cardiac remodeling processes.

    • Main Results:

    • Asynchronous electrical activation, whether from LBBB or RV pacing, affects LV pump function.
    • These conditions can lead to significant long-term cardiac remodeling.
    • Growing evidence links asynchronous activation to the progression of heart failure.

    Conclusions:

    • Asynchronous ventricular activation is a critical factor in cardiac dysfunction.
    • Understanding the impact of LBBB and RV pacing is crucial for managing heart failure risk.
    • Further research into mitigating electrical dyssynchrony may improve patient outcomes.