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A Short‐Term, Randomized, Double‐Blind, Parallel‐Group Study to Evaluate the Efficacy and Safety of Dronedarone versus Amiodarone in Patients with Persistent Atrial Fibrillation: The DIONYSOS Study

LE HEUZEY, JEAN‐YVES, DE FERRARI, GAETANO M., RADZIK, DAVID, SANTINI, MASSIMO, ZHU, JUNREN, DAVY, JEAN‐MARC·2010·Journal of Cardiovascular Electrophysiology

Abstract

Dronedarone versus Amiodarone in Patients with AF. Introduction: We compared the efficacy and safety of amiodarone and dronedarone in patients with persistent atrial fibrillation (AF). Methods: Five hundred and four amiodarone‐naïve patients were randomized to receive dronedarone 400 mg bid (n = 249) or amiodarone 600 mg qd for 28 days then 200 mg qd (n = 255) for at least 6 months. Primary composite endpoint was recurrence of AF (including unsuccessful electrical cardioversion, no spontaneous conversion and no electrical cardioversion) or premature study discontinuation. Main safety endpoint (MSE) was occurrence of thyroid‐, hepatic‐, pulmonary‐, neurologic‐, skin‐, eye‐, or gastrointestinal‐specific events, or premature study drug discontinuation following an adverse event. Results: Median treatment duration was 7 months. The primary composite endpoint was 75.1 and 58.8% with dronedarone and amiodarone, respectively, at 12 months (hazard ratio [HR] 1.59; 95% confidence interval [CI] 1.28–1.98; P < 0.0001), mainly driven by AF recurrence with dronedarone compared with amiodarone (63.5 vs 42.0%). AF recurrence after successful cardioversion was 36.5 and 24.3% with dronedarone and amiodarone, respectively. Premature drug discontinuation tended to be less frequent with dronedarone (10.4 vs 13.3%). MSE was 39.3 and 44.5% with dronedarone and amiodarone, respectively, at 12 months (HR = 0.80; 95% CI 0.60–1.07; P = 0.129), and mainly driven by fewer thyroid, neurologic, skin, and ocular events in the dronedarone group. Conclusion: In this short‐term study, dronedarone was less effective than amiodarone in decreasing AF recurrence, but had a better safety profile, specifically with regard to thyroid and neurologic events and a lack of interaction with oral anticoagulants. (J Cardiovasc Electrophysiol, Vol. 21, pp. 597‐605, June 2010)

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Metadata

Authors
LE HEUZEY, J., DE FERRARI, G. M., RADZIK, D., SANTINI, M., ZHU, J., & DAVY, J.
Venue
Journal of Cardiovascular Electrophysiology
Publisher
Wiley
Published
2010-05-17
Volume
21
Issue
6
Pages
597-605
ISSN
  • 1045-3873 (ISSN-L)
  • 1540-8167
OpenAlex
W2158416204
Cited by
386
References
3
FWCI
41.49
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: A Short‐Term, Randomized, Double‐Blind, Parallel‐Group Study to Evaluate the Efficacy and Safety of Dronedarone versus Amiodarone in Patients with Persistent Atrial Fibrillation: The DIONYSOS Study. https://app.cochat.ai/papers/10.1111/j.1540-8167.2010.01764.x
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LE HEUZEY, J., DE FERRARI, G. M., RADZIK, D., SANTINI, M., ZHU, J., & DAVY, J. (2010). A Short‐Term, Randomized, Double‐Blind, Parallel‐Group Study to Evaluate the Efficacy and Safety of Dronedarone versus Amiodarone in Patients with Persistent Atrial Fibrillation: The DIONYSOS Study. Journal of Cardiovascular Electrophysiology. https://doi.org/10.1111/j.1540-8167.2010.01764.x

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