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Left ventricular function after permanent pacemaker in pacemaker clinic follow-up

Jarin Assavahanrit1, Peerapat Katekangplu, Pornwalee Porapakkham

  • 1Central Chest Institute of Thailand, Nonthaburi, Thailand. cardiocc02@gmail.com

Journal of the Medical Association of Thailand = Chotmaihet Thangphaet
|November 8, 2012
PubMed

Insights

Left ventricular dysfunction is common in patients with chronic right ventricular pacing. Hypertension, coronary artery disease, and increased pacing percentage are associated with this condition.

Area of Science:

  • Cardiology
  • Cardiac Electrophysiology
  • Echocardiography

Background:

  • Chronic right ventricular pacing can negatively impact left ventricular (LV) function, potentially leading to asymptomatic dysfunction.
  • The prevalence of LV dysfunction (LVEF < 50%) in Thai patients undergoing RV pacing is unknown.

Purpose of the Study:

  • To determine the prevalence of LV dysfunction in Thai patients with chronic RV pacing.
  • To identify clinical and pacing parameters associated with LV dysfunction in this population.

Main Methods:

  • Retrospective review of 118 patients from the Central Chest Institute of Thailand pacemaker clinic.
  • Analysis of demographic, pacemaker, and echocardiographic data for LV function in patients with over one year of implantation.

Main Results:

  • Left ventricular systolic dysfunction was identified in 17.80% (21/118) of patients.
  • Patients with LV dysfunction exhibited larger LV size and thinner LV walls compared to those without.
  • Correlations were found with hypertension, coronary artery disease, moderate to severe mitral regurgitation, and moderate to severe tricuspid regurgitation.

Conclusions:

  • Left ventricular dysfunction is a significant concern following pacemaker implantation.
  • Factors associated with LV dysfunction include prior LV issues, hypertension, coronary artery disease, and a higher percentage of ventricular pacing.
  • Pacing mode and lead site did not show a correlation with LV dysfunction.
Abstract

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