The study of antiarrhythmic medications in infancy (SAMIS): a multicenter, randomized controlled trial comparing the efficacy and safety of digoxin versus propranolol for prophylaxis of supraventricular tachycardia in infants.

Journal Article (Journal Article;Multicenter Study)

BACKGROUND: Supraventricular tachycardia (SVT) is one of the most common conditions requiring emergent cardiac care in children, yet its management has never been subjected to a randomized controlled clinical trial. The purpose of this study was to compare the efficacy and safety of the 2 most commonly used medications for antiarrhythmic prophylaxis of SVT in infants: digoxin and propranolol. METHODS AND RESULTS: This was a randomized, double-blind, multicenter study of infants <4 months with SVT (atrioventricular reciprocating tachycardia or atrioventricular nodal reentrant tachycardia), excluding Wolff-Parkinson-White, comparing digoxin with propranolol. The primary end point was recurrence of SVT requiring medical intervention. Time to recurrence and adverse events were secondary outcomes. Sixty-one patients completed the study, 27 randomized to digoxin and 34 to propranolol. SVT recurred in 19% of patients on digoxin and 31% of patients on propranolol (P=0.25). No first recurrence occurred after 110 days of treatment. The 6-month recurrence-free status was 79% for patients on digoxin and 67% for patients on propranolol (P=0.34), and there were no first recurrences in either group between 6 and 12 months. There were no deaths and no serious adverse events related to study medication. CONCLUSIONS: There was no difference in SVT recurrence in infants treated with digoxin versus propranolol. The current standard practice may be treating infants longer than required and indicates the need for a placebo-controlled trial. Clinical Trial Registration Information-; NCT-00390546.

Full Text

Duke Authors

Cited Authors

  • Sanatani, S; Potts, JE; Reed, JH; Saul, JP; Stephenson, EA; Gibbs, KA; Anderson, CC; Mackie, AS; Ro, PS; Tisma-Dupanovic, S; Kanter, RJ; Batra, AS; Fournier, A; Blaufox, AD; Singh, HR; Ross, BA; Wong, KK; Bar-Cohen, Y; McCrindle, BW; Etheridge, SP

Published Date

  • October 2012

Published In

Volume / Issue

  • 5 / 5

Start / End Page

  • 984 - 991

PubMed ID

  • 22962431

Electronic International Standard Serial Number (EISSN)

  • 1941-3084

Digital Object Identifier (DOI)

  • 10.1161/CIRCEP.112.972620


  • eng

Conference Location

  • United States