Cited by 155Cardiac pacing and defibrillation studiesCardiac electrophysiology and arrhythmiasCardiac Arrhythmias and Treatments

Placebo-Controlled, Randomized Clinical Trial of Azimilide for Prevention of Ventricular Tachyarrhythmias in Patients With an Implantable Cardioverter Defibrillator

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Dorian, Paul, Borggrefe, Martin, Al-Khalidi, Hussein R., Hohnloser, Stefan H., Brum, Jose M., Tatla, Daljit S., Brachmann, Johannes, Myerburg, Robert J. +5 more·2004·Circulation

Abstract

Background— Although implanted cardioverter defibrillators (ICDs) effectively treat sustained ventricular tachyarrhythmias, up to 50% of ICD recipients eventually require concomitant antiarrhythmic drug therapy to prevent symptomatic arrhythmia recurrences and hence reduce the number of device therapies. Methods and Results— A total of 633 ICD recipients were enrolled in a randomized, double-blind, placebo-controlled study to evaluate the effect of daily doses of 75 or 125 mg of azimilide on recurrent symptomatic ventricular tachyarrhythmias and ICD therapies. Total all-cause shocks plus symptomatic ventricular tachycardia (VT) terminated by antitachycardia pacing (ATP) were significantly reduced by azimilide, with relative risk reductions of 57% (hazard ratio [HR]=0.43, 95% CI 0.26 to 0.69, P =0.0006) and 47% (HR=0.53, 95% CI 0.34 to 0.83, P =0.0053) at 75- and 125-mg doses, respectively. The reductions in all-cause shocks with both doses of azimilide did not achieve statistical significance. The incidence of all appropriate ICD therapies (shocks or ATP-terminated VT) was reduced significantly among patients taking 75 mg of azimilide (HR=0.52, 95% CI 0.30 to 0.89, P =0.017) and those taking 125 mg of azimilide (HR=0.38, 95% CI 0.22 to 0.65, P =0.0004). Five patients in the azimilide groups and 1 patient in the placebo group had torsade de pointes; all were successfully treated by the device. One patient taking 75 mg of azimilide had severe but reversible neutropenia. Conclusions— Azimilide significantly reduced the recurrence of VT or ventricular fibrillation terminated by shocks or ATP in ICD patients, thereby reducing the burden of symptomatic ventricular tachyarrhythmia.

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  1. Rose MS, Gillis AM, Sheldon RS. Evaluation of the bias in using time to the first event when the inter-event intervals have a Weibull distribution. Stat Med. 1999;18:139 -154.

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Authors
Dorian, P., Borggrefe, M., Al-Khalidi, H. R., Hohnloser, S. H., Brum, J. M., Tatla, D. S., Brachmann, J., Myerburg, R. J., Cannom, D. S., van der Laan, M., Holroyde, M. J., Singer, I., & Pratt, C. M.
Affiliations
  • Goethe University Frankfurt (DE)
  • From the Division of Cardiology, St. Michael’s Hospital (P.D.), Toronto, Ontario, Canada; Klinikum Mannheim (M.B.), Universtatsklinikum, Mannheim, Germany; Health Care Research Center (H.R.A.-K., J.M.B., D.S.T., M.J.H.), Procter & Gamble Pharmaceuticals, Cincinnati, Ohio; J.W. Goethe University (S.H.H.), Department of Cardiology, Division of Electrophysiology, Frankfurt, Germany; Landkrankenhaus Coburg (J.B.), II Medizinische Klinik, Coburg, Germany; University of Miami School of Medicine (R.J.M...
Venue
Circulation
Published
2004-12-14
Volume
110
Issue
24
Pages
3646-3654
ISSN
  • 0009-7322 (ISSN-L)
  • 1524-4539
OpenAlex
W2147134314
Cited by
155
References
29
Citations by year
2025: 3 · 2024: 1 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 6 · 2018: 5 · 2017: 10 · 2016: 6 · 2015: 4 · 2014: 3 · 2013: 14 · 2012: 6
FWCI
9.46
Type
journal article
Language
en
Open access
Locations
  • Circulation (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac pacing and defibrillation studies
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Arrhythmias and Treatments
Keywords
azimilide, implantable cardioverter-defibrillator, ventricular tachyarrhythmia, antiarrhythmic drugs, arrhythmia recurrence prevention, ICD shocks, antitachycardia pacing, ventricular fibrillation, torsades de pointes, neutropenia, dose comparison
MeSH terms
Anti-Arrhythmia Agents, Double-Blind Method, Electric Countershock, Female, Humans, Hydantoins, Male, Middle Aged, Piperazines, Defibrillators, Implantable, Tachycardia, Ventricular, Endpoint Determination, Imidazolidines, Secondary Prevention

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