Document Detail


Hemodynamic and antiadrenergic effects of dronedarone and amiodarone in animals with a healed myocardial infarction.
MedLine Citation:
PMID:  10975596     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The hemodynamic and antiadrenergic effects of dronedarone, a noniodinated compound structurally related to amiodarone, were compared with those of amiodarone after prolonged oral administration, both at rest and during sympathetic stimulation in conscious dogs with a healed myocardial infarction. All dogs (n = 6) randomly received orally dronedarone (10 and 30 mg/kg), amiodarone (10 and 30 mg/kg), and placebo twice daily for 7 days, with a 3-week washout between consecutive treatments. Heart rate (HR), mean arterial pressure (MBP), positive rate of increase of left ventricular pressure (+LVdP/dt), echocardiographically assessed left ventricular ejection fraction (LVEF), and fractional shortening (FS), as well as chronotropic response to isoproterenol and exercise-induced sympathetic stimulation were evaluated under baseline and posttreatment conditions. Resting values of LVEF, FS, +LVdP/dt, and MBP remained unchanged whatever the drug and the dosing regimen, whereas resting HR was significantly and dose-dependently lowered after dronedarone and to a lesser extent after amiodarone. Both dronedarone and amiodarone significantly reduced the exercise-induced tachycardia and, at the highest dose, decreased the isoproterenol-induced tachycardia. Thus, dronedarone and amiodarone displayed a similar level of antiadrenergic effect and did not impair the resting left ventricular function. Consequently, dronedarone might be particularly suitable for the treatment and prevention of various clinical arrhythmias, without compromising the left ventricular function.
Authors:
L Djandjighian; J Planchenault; O Finance; G Pastor; P Gautier; D Nisato
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of cardiovascular pharmacology     Volume:  36     ISSN:  0160-2446     ISO Abbreviation:  J. Cardiovasc. Pharmacol.     Publication Date:  2000 Sep 
Date Detail:
Created Date:  2001-01-02     Completed Date:  2001-01-02     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7902492     Medline TA:  J Cardiovasc Pharmacol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  376-83     Citation Subset:  IM    
Affiliation:
Cardiovascular/Thrombosis Research Department, Sanofi-Synthelabo, Montpellier, France. laurent.djandjighian@sanofi-synthelabo.fr
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MeSH Terms
Descriptor/Qualifier:
Adrenergic Antagonists / pharmacology*
Amiodarone / analogs & derivatives*,  blood,  pharmacology*
Animals
Anti-Arrhythmia Agents / pharmacology*
Dogs
Echocardiography
Female
Hemodynamics / drug effects*
Male
Myocardial Infarction / physiopathology*
Sympathetic Nervous System / physiology
Chemical
Reg. No./Substance:
0/Adrenergic Antagonists; 0/Anti-Arrhythmia Agents; 0/dronedarone; 1951-25-3/Amiodarone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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