A transcardiac lead system for identification and termination of supraventricular and ventricular tachycardia

Paolo Della Bella, Pedro Brugada, Robert Lemery, Thierry Dugernier, Mario Talajic, Jan Heymeriks, Hein J J Wellens

Research output: Contribution to journalArticlepeer-review

Abstract

The value of a transcardiac lead system (coronary sinus to right ventricular apex) to record atrial and ventricular electrical activity and its pacing capabilities was assessed in 20 patients with a variety of tachycardias (atrial tachycardia in 3 patients, atrial flutter in 4, intranodal tachycardia in 6, circus movement tachycardia using an accessory pathway in 1 patient, and ventricular tachycardia in 9). The transcardiac lead invariably showed both atrial and ventricular electrical activity during sinus rhythm and tachycardias, allowing application of the same criteria as used when analyzing cardiac rhythm on the surface electrocardiogram. Atrial complexes had a mean amplitude of 4.2 mV during sinus rhythm and varied from 3.0 to 4.1 mV during the different types of tachycardia. Ventricular complexes had a mean amplitude of 9.8 mV during sinus rhythm, 13.8 mV during supraventricular tachycardia and 16.1 mV during ventricular tachycardia. The duration of the QRS complex on the transcardiac lead was equal to the duration of the QRS complex on the surface electrocardiogram during tachycardias with a small or wide QRS complex. By varying the intensity of current delivered through the transcardiac lead, only right ventricular pacing (mean current intensity 1.2 ± 0.4 mA) or simultaneous atrioventricular pacing (mean current intensity 4.7 ± 3.3 mA) could be achieved. Termination of all episodes of tachycardia was achieved with either ventricular pacing or simultaneous atrioventricular pacing. This transcardiac lead system allows clear identification of atrial and ventricular events, is suitabl for tachycardia analysis using simple surface electrocardiographic algorithms and allows pacing termination of a variety of tachycardias.

Original languageEnglish
Pages (from-to)1043-1050
Number of pages8
JournalThe American Journal of Cardiology
Volume60
Issue number13
DOIs
Publication statusPublished - Nov 1 1987

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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