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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

Effect of cardiac resynchronization therapy in patients with moderate left ventricular systolic dysfunction and wide

Jeffrey W H Fung1, Q Zhang, Gabriel W K Yip

  • 1Division of Cardiology, Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China. jwhfung@cuhk.edu.hk

Journal of Cardiovascular Electrophysiology
|September 22, 2006
PubMed

Insights

Cardiac resynchronization therapy (CRT) significantly improved left ventricular (LV) function and reduced heart failure severity in patients with moderate LV systolic dysfunction. Further research is recommended for less severe heart failure cases.

Area of Science:

  • Cardiology
  • Heart Failure Management
  • Medical Devices

Background:

  • Moderate left ventricular (LV) systolic dysfunction poses a significant challenge in heart failure management.
  • Optimizing treatment for patients with New York Heart Association (NYHA) class III and specific echocardiographic parameters is crucial.

Purpose of the Study:

  • To investigate the impact of cardiac resynchronization therapy (CRT) on disease progression in patients with moderate LV systolic dysfunction.
  • To evaluate the effects of CRT on LV remodeling and heart failure symptoms.

Main Methods:

  • A prospective study involving 15 patients with NYHA class III, LV ejection fraction >35% and <45%, and QRS duration >120 msec.
  • Echocardiographic and standard heart failure assessments were performed before and 3 months after CRT implantation.
  • Comparison with 30 matched patients receiving conventional CRT.

Main Results:

  • Significant reductions in LV end-systolic and end-diastolic volumes were observed post-CRT.
  • Improvement in LV ejection fraction and NYHA class was significant.
  • No difference in LV volumes, ejection fraction, or exercise capacity compared to the conventional group, but a greater quality of life improvement in the conventional group.

Conclusions:

  • CRT demonstrated significant LV reverse remodeling in patients with moderate LV systolic dysfunction and wide QRS complex.
  • The findings suggest potential benefits of CRT in this patient subgroup.
  • Further studies are warranted to explore CRT's benefits in patients with less severe heart failure.
Abstract

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