High-density mapping of spontaneous pulmonary vein activity initiating atrial fibrillation in humans

Thomas Arentz, Laurent Haegeli, Prashanthan Sanders, Reinhold Weber, Franz Josef Neumann, Dietrich Kalusche, Michel Haïssaguerre

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43 Citations (Scopus)

Abstract

Basket Mapping of the Pulmonary Veins. Introduction: High-density three-dimensional (3D) mapping of the pulmonary vein (PV)-left atrial (LA) junction was performed to characterize spontaneous PV activity in humans. Methods and Results: The activation patterns of ectopic beats and of the initial 2 seconds of atrial fibrillation (AF) from the PVs were analyzed using a 64-poles basket catheter. A focal mechanism was defined as a discrete site of early and centrifugal activation. Continuous activity was considered as an activation covering ≥80% of the tachycardia beat-to-beat cycle length within the mapping field. In 35 patients, 123 spontaneous focal ectopic beats that did not induce AF and 95 that did induce AF were mapped. The mean coupling interval of ectopic discharges not inducing AF was 281 ± 70 msec versus 236 ± 90 msec for ectopies initiating AF (P ≤ 0.01). The first ectopic activity of all 218 arrhythmogenic events showed exclusively a focal mechanism. During the 95 episodes of AF initiation, one or two ectopic beats from the PVs initiated AF in the LA in 39%, a stable focal tachycardia was recorded in 14%, continuous activity with important changes in cycle length (35 ± 15 msec) suggestive of decremental or fibrillatory conduction was found in 18%, and in 29% the activation pattern could not be classified. No stable and sustained reentrant circuit could be identified by our mapping tool in the PV-LA junction. Conclusions: Arrhythmogenic activity from PVs in humans is predominantly due to discrete focal activity.

Original languageEnglish
Pages (from-to)31-38
Number of pages8
JournalJournal of Cardiovascular Electrophysiology
Volume18
Issue number1
DOIs
Publication statusPublished or Issued - Jan 2007

Keywords

  • Atrial fibrillation
  • Basket catheter
  • Pulmonary veins
  • Reentry

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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