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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
Dual chamber pacing in the treatment of congestive heart failure
G Saccomanno1, A Fraticelli, M Marini
1Cardiology Department, I.N.R.C.A. - I.R.C.C.S., Via della Montagnola, 164, I-60131 Ancona AN, Italy.
Insights
Dual chamber pacing can improve heart function in patients with congestive heart failure (CHF) by optimizing ventricular filling. This pacing strategy offers a potential treatment for CHF unresponsive to standard medical therapies.
Area of Science:
- Cardiology
- Medical Devices
Background:
- Congestive heart failure (CHF) patients often have suboptimal atrial contribution to ventricular filling.
- First-degree atrioventricular block and mitral insufficiency are common in elderly CHF patients, further impairing cardiac function.
Purpose of the Study:
- To review literature and author experience on dual chamber pacing for CHF treatment.
- To evaluate the efficacy of dual chamber pacing in improving cardiac output and heart failure parameters.
Main Methods:
- Review of current literature on dual chamber pacing in CHF.
- Analysis of authors' clinical experience with dual chamber pacing in CHF patients.
Main Results:
- Dual chamber pacing with short atrioventricular delays enhances ventricular filling and cardiac output.
- Improvements observed in clinical and instrumental parameters of heart failure.
Conclusions:
- Dual chamber pacing is a viable treatment option for CHF refractory to medical therapy.
- Consideration of interatrial conduction time is crucial for optimal atrioventricular synchronization.
- This pacing method can enhance cardiac function by optimizing atrial contribution to ventricular filling.
Abstract:
The present work reviews current literature and the authors' experience of dual chamber pacing in the treatment of patients with congestive heart failure (CHF). In these patients, the atrial contribution to ventricular filling may be less than optimal, especially in the presence of first degree atrioventricular block or mitral insufficiency, both of which are common in the elderly subject with CHF. Dual chamber pacing with short atrioventricular delays has proved effective in enhancing ventricular filling and, in selected cases, cardiac output, with improvement in clinical and instrumental parameters of heart failure. However, for an appropriate atrioventricular synchronization of the left chambers during pacing, the interatrial conduction time must be considered, to avoid atrial contraction against a closed mitral valve. Thus, dual chamber pacing may be a treatment option for CHF that fails to respond to medical therapy.
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