Electrophysiologic testing in patients with sinus pauses and/or sinoatrial exit block

M. M. Scheinman, H. C. Strauss, J. A. Abbott, G. T. Evans, R. W. Peters, D. G. Benditt, A. G. Wallace

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

28 symptomatic patients with documented episodes of sinus pauses and/or sinoatrial exit block underwent electrophysiologic study. Abnormal responses to electrophysiologic testing were observed in 23/28 patients (82%). Abnormal prolongation of the maximum sinus node recovery time (SNRT max) occurred in 17/28 (61%) patients, of postpacing cycles 2-10 (secondary pauses) in 21/28 (75%), and of estimated sinoatrial conduction time in 15/28 (54%). The incidence of abnormal responses to rapid atrial pacing (prolonged SNRT max or secondary pauses) (22/28, 79%) was higher than the incidence of abnormal responses to premature atrial stimulation (15/28, 54%) (P< 0.005). Life-threatening cardiac arrhythmias were observed, prior to electrophysiologic study, in 5 out of 28 (18%) patients. Symptomatic patients with sinus pauses and/or sinoatrial exit block frequently (23/28, 82%) showed abnormal responses to electrophysiologic testing and have a relatively high incidence of life-threatening arrhythmias.

Original languageEnglish (US)
Pages (from-to)51-60
Number of pages10
JournalEuropean journal of cardiology
Volume8
Issue number1
StatePublished - Dec 1 1978

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