His Bundle Recordings in Double Tachycardias Not Due to Digitalis Intoxication


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Electrophysiological studies were performed in a patient with chronic chagasic cardiomyapathy, recurrent sustained ventricular tachycardia, and a history (without electrocordiographic documentation) of paroxysmal atrial flutter. Ventriculoauricular conduction occurred during short bursts of ventricular pacing. Moreover, the retrograde P of ectopic ven‐tricular heats which appeared after pacing was stopped precipitated an atrial tachyarrhythmia with an irregular atrial rate. In addition, burst ventricular pacing, performed while this atrial tachyar‐rhythmia was present, initiated and subsequently terminated a ventricular tachycardia with similar characteristics to the one occurring spontaneously. The double (alrial and ventricular) tachycardias described in this communication were different from those previously reported in that the arrhythmias were not due to digitalis toxicity, but resulted from the modality of ventricular stimulation performed in a patient who had the specific type of cardiomyopathy seen in the chronic stage of Chagas' disease, (PACE, Vol. 5, September‐October, 1982)

Original languageEnglish (US)
Pages (from-to)751-757
Number of pages7
JournalPacing and Clinical Electrophysiology
Issue number5
StatePublished - Sep 1982


  • His bundle recordings
  • burst pacing
  • chronic chagasic cardiomyopathy
  • double tachycardia
  • irregular atrial tachycardia
  • ventricular tachycardia

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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