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Termination of long-lasting persistent versus short-lasting persistent and paroxysmal atrial fibrillation by ablation

Martin Fiala1, Jan Chovancík, Renáta Nevralová

  • 1Department of Cardiology, Heart Center, Hospital Podlesí a.s., Trinec, Czech Republic. martin.fiala@nempodlesi.cz

Pacing and Clinical Electrophysiology : PACE
|August 8, 2008
PubMed

Insights

Restoring sinus rhythm (SR) during ablation is less successful for long-lasting persistent atrial fibrillation (AF) compared to other AF types. Ablation success for SR restoration correlates with better long-term clinical outcomes in AF patients.

Area of Science:

  • Electrophysiology
  • Cardiology
  • Medical Devices

Background:

  • Left atrial (LA) structures involved in maintaining atrial fibrillation (AF) vary by AF type.
  • Understanding these differences is crucial for effective ablation strategies.

Purpose of the Study:

  • To evaluate the incidence, electrophysiological patterns, and LA sites of sinus rhythm (SR) restoration during ablation for different AF forms.
  • To compare ablation outcomes across long-lasting persistent AF, short-lasting persistent AF, and paroxysmal AF.

Main Methods:

  • Retrospective comparison of 100 patients with long-lasting persistent AF, 35 with short-lasting persistent AF, and 59 with paroxysmal AF.
  • All patients underwent a first ablation using a stepwise approach targeting SR restoration.

Main Results:

  • SR restoration success rates were 38% (long-lasting persistent AF), 83% (short-lasting persistent AF), and 97% (paroxysmal AF).
  • Modes of SR restoration differed significantly, with LA tachycardia conversion more common in long-lasting persistent AF, and pulmonary vein encircling in paroxysmal AF.
  • SR restoration by ablation was associated with better clinical outcomes during follow-up.

Conclusions:

  • Ablation for long-lasting persistent AF shows higher failure rates for SR restoration.
  • Predominant mechanisms in long-lasting persistent AF include LA tachycardia conversion and ablation sites outside the LA posterior wall.
  • Successful SR restoration via ablation is linked to improved clinical outcomes in AF patients.
Abstract

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