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

Ching Tai Tai, Yung Kuo Lin, Shih Ann Chen

Research output: Contribution to journalArticle

9 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)384-387
Number of pages4
JournalPACE - Pacing and Clinical Electrophysiology
Issue number3
Publication statusPublished - 2001
Externally publishedYes



  • Atrial flutter
  • Catheter ablation
  • Fossa ovalis

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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