Atrial tachycardia masquerading as atrial flutter following ablation of the subeustachian isthmus

Ruchir Sehra, Mark A. Coppess, Gregory T. Altemose, Claudio A. Militello, John M. Miller

Research output: Contribution to journalArticle

7 Scopus citations


We report a case of atrial tachycardia masquerading as atrial flutter in a man who had previously undergone catheter ablation for atrial flutter. The recurrent arrhythmia was electrocardiographically almost identical to the prior atrial flutter; at repeat electrophysiologic study, although bidirectional conduction block was observed in the tricuspid annulus-inferior vena caval isthmus, the atrial arrhythmia was readily initiated. Activation mapping suggested typical atrial flutter, but entrainment techniques demonstrated intra-atrial reentry not involving the ablated isthmus. This case illustrates the need to apply entrainment techniques even in cases of apparent 'typical' atrial flutter to confirm that putative ablation targets are necessary for tachycardia perpetuation.

Original languageEnglish (US)
Pages (from-to)582-586
Number of pages5
JournalJournal of Cardiovascular Electrophysiology
Issue number5
StatePublished - Jan 1 2000



  • Atrial flutter
  • Atrial tachycardia
  • Catheter ablation
  • Entrainment

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology

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