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A comparison of cardiac resynchronization by sequential biventricular pacing and left ventricular pacing to
David B De Lurgio1, Elyse Foster, Michael B Higginbotham
1Carlyle Fraser Heart Center, Division of Cardiology, Emory University School of Medicine, Atlanta, GA 30365, USA.
Journal of Cardiac Failure
|April 7, 2005
Summary
This study compares three cardiac resynchronization therapy (CRT) pacing methods for heart failure: left ventricular, simultaneous biventricular, and sequential biventricular pacing. Results will guide optimal CRT device selection for improved patient outcomes.
Area of Science:
- Cardiology
- Medical Devices
- Heart Failure Management
Background:
- First-generation cardiac resynchronization therapy (CRT) devices utilized simultaneous biventricular (BiV) pacing for heart failure treatment.
- Left ventricular (LV) pacing and sequential BiV pacing are alternative CRT delivery methods with potential benefits.
- These alternative CRT pacing strategies have not been extensively compared in large randomized trials.
Purpose of the Study:
- To compare the effectiveness and safety of LV pacing, simultaneous BiV pacing, and sequential BiV pacing in heart failure patients.
- To evaluate novel pacing approaches for optimizing ventricular resynchronization and reverse remodeling.
- To assess the performance of the CONTAK RENEWAL 2/4/4HE/EASYTRAK 2 system in a diverse patient population.
Main Methods:
- The DECREASE-HF trial is a randomized, double-blind, 3-arm study.
- Enrolled patients have New York Heart Association Class III or IV heart failure, ejection fraction ≤35%, and QRS duration ≥150 ms.
- Participants are randomized to receive LV pacing, simultaneous BiV pacing, or sequential BiV pacing.
Main Results:
- A novel composite endpoint combines peak oxygen consumption and LV end-systolic dimension for a comprehensive assessment.
- Symptomatic improvement (peak oxygen consumption) and physiological reverse remodeling (LV end-systolic dimension) are key outcome measures.
- Safety and effectiveness are evaluated through adverse events, system complications, and lead performance metrics.
Conclusions:
- The study aims to provide critical data on the comparative efficacy of different CRT pacing modalities.
- Findings will inform clinical decision-making regarding the selection of CRT pacing strategies for heart failure.
- The research will contribute to the understanding of CRT device performance and patient response.