4.5 Article

Conduction system pacing and atrioventricular node ablation in heart failure: The PACE-FIB study design

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ESC HEART FAILURE
卷 -, 期 -, 页码 -

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WILEY PERIODICALS, INC
DOI: 10.1002/ehf2.14488

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Atrial fibrillation; Heart failure; Atrioventricular node; Pacemaker; Left bundle branch pacing

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This study aims to explore the long-term benefits and safety profile of heart rate regularization through left-bundle branch pacing (LBBP) and atrioventricular node ablation (AVNA) compared with pharmacological rate-control strategy in patients with heart failure and permanent atrial fibrillation. The study will be conducted from March 2022 to February 2027, with 334 patients enrolled and followed up for a minimum of 36 months. The primary outcome measure is the composite of all-cause mortality, heart failure hospitalization, and worsening heart failure at 36 months.
AimsAtrial fibrillation (AF) worsens the prognosis of patients with heart failure (HF). Successful treatments are still very scarce for those with permanent AF and preserved (HFpEF) or mildly reduced (HFmrEF) ejection fraction. In this study, the long-term benefits and safety profile of heart rate regularization through left-bundle branch pacing (LBBP) and atrioventricular node ablation (AVNA) will be explored in comparison with pharmacological rate-control strategy.Methods and resultsThe PACE-FIB trial is a multicentre, prospective, open-label, randomized (1:1) clinical study that will take place between March 2022 and February 2027. A total of 334 patients with HFpEF/HFmrEF and permanent AF will receive either LBBP followed by AVNA (intervention arm) or optimal pharmacological treatment for heart rate control according to European guideline recommendations (control arm). All patients will be followed up for a minimum of 36 months. The primary outcome measure will be the composite of all-cause mortality, HF hospitalization, and worsening HF at 36 months. Other secondary efficacy and safety outcome measures such as echocardiographic parameters, functional status, and treatment-related adverse events, among others, will be analysed too.ConclusionLBBP is a promising stimulation mode that may foster the clinical benefit of heart rate regularization through AV node ablation compared with pharmacological rate control. This is the first randomized trial specifically addressing the long-term efficacy and safety of this pace-and-ablate strategy in patients with HFpEF/HFmrEF and permanent AF.

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