Heart rate during spontaneous and induced paroxysmal supraventricular tachycardia.

Journal Article (Journal Article)

It is generally assumed that paroxysmal supraventricular tachycardia (PSVT) induced during invasive electrophysiological study reproduces the patient's spontaneous, clinical arrhythmia. Even in the absence of antiarrhythmic drugs, however, there may be significant differences in characteristics of the induced and spontaneous arrhythmias. We compared the heart rate of PSVT in 38 patients who had undergone electrophysiological study with induction of PSVT who also had a spontaneous episode of PSVT documented by transtelephonic ECG monitoring during a period when all antiarrhythmic drugs were withheld. The heart rate during spontaneous PSVT was faster than the heart rate of PSVT induced during electrophysiological study; the mean difference was 16 beats/min (P < 0.001). We conclude that heart rate of PSVT induced during electrophysiological study generally underestimates the heart rate of spontaneous PSVT in the antiarrhythmic drug-free state. This may be due to differences in the autonomic and hemodynamic states during spontaneous and induced arrhythmias.

Full Text

Duke Authors

Cited Authors

  • Hamer, ME; Wilkinson, WE; McCarthy, EA; Page, RL; Pritchett, EL

Published Date

  • December 1995

Published In

Volume / Issue

  • 18 / 12 Pt 1

Start / End Page

  • 2155 - 2157

PubMed ID

  • 8771127

International Standard Serial Number (ISSN)

  • 0147-8389

Digital Object Identifier (DOI)

  • 10.1111/j.1540-8159.1995.tb04641.x


  • eng

Conference Location

  • United States