Catecholamine dependent accessory pathway automaticity

Zian H. Tseng, Anil V. Yadav, Melvin M. Scheinman

Research output: Contribution to journalArticle

10 Scopus citations


Automaticity from extra nodal accessory pathways appears to be rare. We report the case of a man with the WPW syndrome who presented for repeat electrophysiological study and catheter ablation. After successful ablation of a paraHisian accessory pathway, an isoproterenol challenge produced an accelerated wide complex rhythm that was dissociated from sinus rhythm and matched the previous pattern of maximal preexcitation. This automatic rhythm was transient and dependent on catecholamine administration. One month after successful ablation, an exercise treadmill test (ETT) did not demonstrate any pre-excitation or ectopy.

Original languageEnglish (US)
Pages (from-to)1005-1007
Number of pages3
JournalPACE - Pacing and Clinical Electrophysiology
Issue number7
StatePublished - Jul 1 2004


  • Accessory pathway automaticity
  • Radiofrequency catheter ablation
  • WPW

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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