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Atrial Fibrillation Ablation Success Rate - A Retrospective Multicenter Study.

Oded Ayzenberg1, Moshe Swissa2, Tomer Shlezinger3

  • 1Maccabi Health Organization, Cardiology Section; Department of Cardiology, Kaplan Medical Center, Rehovot, Hebrew University.

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Summary
This summary is machine-generated.

Pulmonary vein isolation (PVI) for atrial fibrillation (AF) shows a 56% success rate at two years in a real-world setting. While effective, complication rates were higher than reported, suggesting areas for improvement in PVI procedures.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Economics

Background:

  • Atrial fibrillation (AF) presents a significant global health and economic challenge.
  • Pulmonary vein isolation (PVI) is an established rhythm control strategy for AF, with recent data suggesting superiority over anti-arrhythmic drugs.
  • Existing studies on PVI efficacy often originate from specialized centers, potentially not reflecting outcomes in broader patient populations.

Purpose of the Study:

  • To evaluate the real-world success rates and complication profile of PVI procedures for AF.
  • To assess long-term rhythm control outcomes in a large, unselected patient cohort undergoing PVI.
  • To identify factors influencing PVI success and compare outcomes with existing literature.

Main Methods:

  • Retrospective analysis of 300 consecutive PVI procedures performed on 291 patients between 2014-2015 at a major HMO.
  • Data collection included patient demographics, clinical characteristics, acute procedural outcomes, and long-term success (sinus rhythm at 2 years) via ECG and Holter monitoring.
  • Procedures were conducted by experienced electrophysiologists across 8 medical centers, with 85% utilizing radiofrequency (RF) ablation techniques.

Main Results:

  • The overall 2-year success rate for maintaining sinus rhythm was 56%.
  • Success rates correlated with patient age and standard risk factors.
  • Patients undergoing their first ablation had a 78% success rate, while those requiring repeat procedures (2nd, 3rd/4th) showed success rates of 64% and 56%, respectively.
  • The overall probability of maintaining sinus rhythm at 2 years, irrespective of the number of ablations, was 78%.
  • A complication rate of 6.6% was observed, including 2.5% serious complications and 2 deaths (1 procedure-related).

Conclusions:

  • PVI is a viable therapeutic option for AF in a large, unselected, real-world population, achieving a 56% success rate at two years.
  • The observed complication rate in this cohort was higher than previously reported in the literature.
  • Further research into cryo-ablation techniques and procedural optimization may enhance the efficacy and safety of PVI for AF management.