Life-table methods for evaluating antiarrhythmic drug efficacy in patients with paroxysmal atrial tachycardia.


Journal Article

Spontaneous variability in the occurrence of paroxysmal arrhythmias has made it difficult to apply objective and quantitative methods to describe their clinical course. In this study of paroxysmal atrial tachycardia, the "tachycardia-free interval" was used as a quantitative measure of drug efficacy during treatment with oral verapamil. The tachycardia-free interval is the time a patient remains free from an episode of tachycardia after drug treatment is begun. We documented recurrent tachycardia by telephone transmission of the electrocardiogram. Improvement caused by increasing the drug dose (360 versus 480 mg/day) or by comparing verapamil with placebo treatment was demonstrated by upward shifts in the cumulative tachycardia-free interval curves. The tachycardia-free interval is an easily measured clinical variable that has substantial promise in the study of paroxysmal arrhythmias.

Full Text

Duke Authors

Cited Authors

  • Pritchett, EL; Hammill, SC; Reiter, MJ; Lee, KL; McCarthy, EA; Zimmerman, JM; Shand, DG

Published Date

  • November 1, 1983

Published In

Volume / Issue

  • 52 / 8

Start / End Page

  • 1007 - 1012

PubMed ID

  • 6356859

Pubmed Central ID

  • 6356859

International Standard Serial Number (ISSN)

  • 0002-9149


  • eng

Conference Location

  • United States