Atypical atrial flutter involving the isthmus between the right pulmonary veins and fossa ovalis

Pacing Clin Electrophysiol. 2001 Mar;24(3):384-7. doi: 10.1046/j.1460-9592.2001.t01-1-00384.x.

Abstract

Typical atrial flutter, counterclockwise or clockwise movement around the tricuspid annulus, has been well studied. However, the reentrant circuits in atypical atrial flutter are not well defined. A patient without a prior history of cardiac surgery who presented with incessant atypical atrial flutter is described. Activation mapping demonstrated a circular movement around the fossa ovalis in the interatrial septum. Entrainment mapping demonstrated a protected isthmus between the right pulmonary veins and the fossa ovalis. Radiofrequency ablation of this isthmus terminated atrial flutter without recurrence during the follow-up period.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Atrial Flutter / physiopathology*
  • Atrial Flutter / surgery
  • Catheter Ablation
  • Electrocardiography
  • Fluoroscopy
  • Humans
  • Male
  • Pulmonary Veins