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Acute effects of complex fractionated atrial electrogram ablation on dominant frequency and regulatory index for the

Gabor Bencsik1, Martin Martinek, Said Hassanein

  • 1Department of Cardiology, Public Hospital Elisabethinen, Academic Teaching Hospital, Linz, Austria. blackdoor@t-online.hu

Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology
|May 16, 2009
PubMed

Insights

Complex fractionated electrogram (CFAE) ablation after pulmonary vein isolation (PVI) did not significantly alter atrial fibrillation (AF) dynamics. Standard PVI and other ablation lines showed more impact on the fibrillatory process.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Devices

Background:

  • Atrial fibrillation (AF) ablation strategies aim to disrupt arrhythmogenic substrates.
  • Complex fractionated electrograms (CFAE) are potential targets, but their acute impact needs clarification.

Purpose of the Study:

  • To assess the acute effects of CFAE ablation, guided by automated detection, on dominant frequency (DF) and regulatory index (RI) during atrial fibrillation (AF).

Main Methods:

  • Forty-one patients with AF underwent catheter ablation, including pulmonary vein isolation (PVI), CFAE ablation, roof line, and mitral isthmus ablation.
  • DF and RI in the coronary sinus were monitored after each ablation step.
  • CFAE ablation targeted areas outside prior PVI lines.

Main Results:

  • CFAE ablation showed a low termination rate (12.5% paroxysmal, 10% persistent AF).
  • Significant changes in DF and RI were not observed after CFAE ablation (<0.25 Hz, max 0.02 RI increase).
  • PVI, roof line, and mitral isthmus ablation yielded significant DF and RI modifications.

Conclusions:

  • CFAE ablation, when performed after standard PVI without remapping, has minimal acute impact on the AF fibrillatory process.
  • Further research with modified CFAE ablation algorithms and settings is warranted.
Abstract

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