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Published on: February 26, 2013
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Superwide Left Atrial Circumferential Ablation for Persistent Atrial Fibrillation: A Randomized Controlled Trial
Yue Cao1,2, Wei Du1,2, Yalan Fei1,2
1Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China.
Journal of Cardiovascular Electrophysiology
|April 30, 2025
Summary
Superwide left atrial circumferential ablation (SWLACA) reduced atrial fibrillation recurrence compared to pulmonary vein antrum isolation (PVAI). However, overall arrhythmia recurrence rates were similar after a single procedure for persistent AF.
Area of Science:
- Electrophysiology
- Cardiology
- Medical Devices
Background:
- Investigating enhanced ablation strategies for atrial fibrillation (AF).
- Comparing superwide left atrial circumferential ablation (SWLACA) with pulmonary vein antrum isolation (PVAI).
Purpose of the Study:
- To assess the effectiveness of SWLACA versus PVAI for persistent AF (PeAF) using a randomized controlled study.
Main Methods:
- 248 patients with PeAF were randomized into SWLACA and PVAI groups.
- SWLACA involved ablation lines 2-3 cm from PV ostia; PVAI used lines ~1 cm.
- Primary endpoint was atrial tachyarrhythmia recurrence after a single procedure.
Main Results:
- SWLACA created larger isolation areas but had longer procedure and fluoroscopic times.
- No significant difference in overall recurrence after one procedure (21.0% vs 26.6%).
- SWLACA showed fewer AF recurrences (12.9% vs 25.0%) but more atrial tachycardia recurrences (8.1% vs 1.6%).
- SWLACA achieved a higher total arrhythmia recurrence-free rate after multiple procedures.
Conclusions:
- SWLACA significantly reduced AF recurrence in PeAF patients compared to PVAI.
- While overall recurrence rates were similar after one procedure, SWLACA improved long-term outcomes.
