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Atrioventricular node reentry: physiology and radiofrequency ablation

E N Prystowsky1

  • 1Clinical Electrophysiology Laboratory, St. Vincent Hospital, Indianapolis, Indiana, USA.

Pacing and Clinical Electrophysiology : PACE
|February 1, 1997
PubMed
Summary

Atrioventricular (AV) node reentry, a common arrhythmia, is effectively treated with radiofrequency catheter ablation. Experienced electrophysiologists achieve high cure rates using a posterior approach, minimizing complications.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Arrhythmias

Background:

  • Atrioventricular (AV) node reentry is a recognized clinical arrhythmia.
  • Dual AV conduction physiology underlies this arrhythmia, leading to echo beats.
  • Human studies confirmed dual AV node physiology and AV node reentry.

Purpose of the Study:

  • To review the understanding and management of AV node reentry.
  • To highlight the efficacy of radiofrequency catheter ablation.
  • To discuss the preferred posterior approach for ablation.

Main Methods:

  • Review of basic investigations and subsequent human studies on AV node reentry.
  • Analysis of different types of AV node reentry (slow-fast, fast-slow, intermediate).
  • Evaluation of radiofrequency catheter ablation outcomes, particularly the posterior approach.

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Main Results:

  • Slow-fast AV node reentry is the most common type.
  • Radiofrequency catheter ablation by experienced electrophysiologists yields high cure rates (>95%).
  • The posterior approach is highly successful for all reentry types with a 1-2% heart block incidence.

Conclusions:

  • AV node reentry is a well-understood arrhythmia with effective treatment options.
  • Radiofrequency catheter ablation, especially via the posterior approach, offers a high cure rate.
  • Experienced electrophysiologists can safely and effectively treat AV node reentry with minimal complications.