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Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
Published on: February 26, 2013
Rationale for the Atrial Fibrillation and Congestive Heart Failure (AF-CHF) trial
1Research Center, Montreal Heart Institute, Montreal, Quebec, Canada. roy@icm.umontreal.ca
Insights
This study compares rhythm versus rate control for patients with atrial fibrillation (AF) and congestive heart failure (CHF). Rhythm control may reduce cardiovascular mortality in these complex patients.
Area of Science:
- Cardiology
- Heart Failure Research
- Atrial Fibrillation Management
Background:
- Congestive heart failure (CHF) and atrial fibrillation (AF) frequently coexist, complicating patient management.
- AF is an independent risk factor for mortality and morbidity in CHF patients.
- Previous studies on AF and CHF lacked randomization and were often retrospective.
Purpose of the Study:
- To compare the efficacy of rhythm control versus rate control strategies in patients with AF and CHF.
- To evaluate the impact of these strategies on cardiovascular mortality.
- To provide evidence-based guidance for managing coexisting AF and CHF.
Main Methods:
- Prospective, multicenter randomized trial (AF-CHF).
- 1450 CHF patients with left ventricular ejection fraction (LVEF) ≤35% and recent AF episode randomized.
- Comparison of rhythm control strategy versus rate control strategy.
Main Results:
- Anticipated 18.75% 2-year cardiovascular mortality in the rate control arm.
- Anticipated 25% event reduction in the rhythm control group.
- Enrollment nearing completion with ongoing follow-up.
Conclusions:
- Rhythm control strategy may offer a survival benefit in patients with AF and CHF.
- Further analysis of AF-CHF trial data is needed to confirm findings.
- This trial addresses a critical gap in managing complex cardiovascular conditions.
Abstract:
Congestive heart failure and atrial fibrillation (AF) are two important and growing problems in medicine and cardiology. Both conditions often coexist and complicate each other's management. Two therapeutic strategies are available for patients with AF and congestive heart failure: the first aims at restoring and maintaining sinus rhythm, whereas the second focuses exclusively on optimizing ventricular rate. Prior studies of AF and congestive heart failure were not randomized and most were retrospective. Although some studies suggested that AF had no effect on survival, in most recent large congestive heart failure trials, AF was reported to be an independent risk factor for mortality or major morbidity. The primary objective of the Atrial Fibrillation in Congestive Heart Failure (AF-CHF) trial is to compare the two widely used treatment strategies with respect to cardiovascular mortality. AF-CHF is a prospective, multicenter trial that will randomize 1450 CHF patients with left ventricular ejection fraction (LVEF) < or =35% and a documented recent episode of atrial fibrillation to either a rhythm control or a rate control strategy. From recent trial data, we anticipate an 18.75% 2-year cardiovascular mortality in the rate control arm and a 25% event reduction in the rhythm control group. As of December 2003, 960 patients have been randomized. Enrollment is expected to be completed in September 2004 with a minimum follow-up of 2 years.
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