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Updated: Jun 3, 2026
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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
Atrioventricular and interventricular delay optimization in cardiac resynchronization therapy: physiological
Patrick Houthuizen1, Frank A L E Bracke, Berry M van Gelder
1Department of Cardiology, Catharina Hospital, P.O. Box 1350, 5602 ZA Eindhoven, The Netherlands. cardiology@houthuizen.be
Heart Failure Reviews
|March 25, 2011
Summary
Optimizing cardiac resynchronization therapy (CRT) involves adjusting delays for better heart function. Current methods lack large-scale validation, necessitating dynamic, automated approaches for exercise and remodeling.
Area of Science:
- Cardiology
- Biomedical Engineering
Background:
- Cardiac resynchronization therapy (CRT) aims to improve heart function by synchronizing ventricular contractions.
- Optimizing atrioventricular (AV) and interventricular (VV) delays is crucial for CRT efficacy.
- Physiological factors like exercise and long-term therapy influence optimal CRT settings.
Purpose of the Study:
- To review the physiological rationale behind AV and VV delay optimization in CRT.
- To critically appraise existing invasive and non-invasive methods for CRT optimization.
- To identify gaps in current CRT optimization strategies and suggest future directions.
Main Methods:
- Literature review of studies on CRT delay optimization.
- Critical appraisal of invasive and non-invasive optimization techniques.
- Analysis of physiological influences on CRT effectiveness.
Main Results:
- A wide range of optimization methods exist, but none are universally recommended due to a lack of large-scale studies with hard endpoints.
- Current optimization primarily focuses on resting conditions.
- Significant need exists for dynamic optimization strategies to adapt to physiological changes.
Conclusions:
- No single CRT optimization method is currently standard practice.
- Further research is required, focusing on large-scale trials with clinical endpoints.
- Development of automated algorithms for dynamic CRT optimization is essential to adapt to exercise and anatomical remodeling.
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