3 years ago

Pulmonary Vein Isolation Cryoablation for Persistent and Long-Standing Persistent Atrial Fibrillation Patients. Clinical Outcomes from Real Word Multicentric Observational Project

Pulmonary vein isolation (PVI) is a cornerstone ablation strategy in the management of patients with atrial fibrillation (AF). Consensus guidelines and statements recommend PVI during the index catheter ablation procedure in patients with paroxysmal and persistent AF. Objective The objective of this analysis was to evaluate patients with persistent and long-standing persistent AF who were treated with the cryoballoon ablation catheter by PVI technique. Methods Consecutive patients with drug-refractory symptomatic persistent and long-standing persistent AF who underwent cryoballoon catheter ablation by a PVI-only procedure were prospectively included in this single-arm multicenter evaluation. Data on procedural characteristics, safety, and long-term freedom from AF recurrence were analyzed. Results 486 subjects (mean age 60.8 ± 9.3 years, 80% male, left atrial diameter 44.6 ± 6.2 mm, 89.3% with persistent AF, and 10.7% with long-standing persistent AF) underwent cryoballoon ablation in 35 Italian centers. Mean procedural time (skin-to-skin) was 109.9 ± 52.9 minutes, and mean fluoroscopy time was 29.6 ± 14.5 minutes. Peri-procedural complication were observed in 21 (4.3%) subjects, and the acute PVI success rate was 97.6% across all patients. Using a 90-day blanking period, single procedure Kaplan-Meier estimates of AF event-free survival were 63.9% at 12 months and 51.5% at 18 months. Conclusions In this multicenter evaluation of cryoballoon ablation, the PVI procedure was safe, effective, and efficient with regards to the treatment of patients with persistent and long-standing persistent AF. The reasonable mid-term success rates agree with current clinical studies which establish PVI as a cornerstone index ablation strategy.

Publisher URL: www.sciencedirect.com/science

DOI: S1547527117312523

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