Acute Electropharmacological Effects of Intravenously Administered Amiodarone Assessed in the In Vivo Canine Model
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概要
- 論文の詳細を見る
Acute hemodynamic and electrophysiological effects of amiodarone were assessed simultaneously, using the halothane-anesthetized, closed-chest in vivo canine model in comparison with those of solvent ethanol alone. Intravenous administration of the solvent (n = 8) induced no significant change in any of the cardiovascular parameters. On the other hand, intravenous amiodarone in the canine antiarrhythmic dose of 3.0 mg/kg (n = 6) exerted negative chronotropic, inotropic and dromotropic effects in addition to the transient hypotensive action followed by an increase of the total peripheral vascular resistance. Amiodarone also prolonged both the ventricular repolarization phase and the effective refractory period, where the increment was greater in the latter than in the former, indicating the shortening of the electrical vulnerable period of the ventricle. More importantly, appearance of the electrophysiological effect on repolarization took more time and higher dose compared with the effect on refractoriness, which could be detected at a one tenth the dose. These results support the previous knowledge that intravenously administered amiodarone possesses class I, III and IV actions and suggest that shortening of the electrical vulnerable period may be one of the unique antiarrhythmic properties of intravenous amiodarone against re-entry type arrhythmias.
- 社団法人 日本薬理学会の論文
- 2001-09-01
著者
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Satoh Y
Department Of Pharmacology Interdisciplinary Graduate School Of Medicine And Engineering University
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Satoh Yoshioki
Department Of Pharmacology Interdisciplinary Graduate School Of Medicine And Engineering University
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Sugiyama Atsushi
Department Of Pharmacology Yamanashi Medical University
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Hashimoto Keitaro
Department Of Pharmacology Interdisciplinary Graduate School Of Medicine And Engineering University
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Hashimoto Keitaro
Department Of Pharmacology Interdisciplinary Graduate School Of Medicine And Engineering University
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Sugiyama Atsushi
Department Of Pharmacology. University Of Yamanashi Yamanashi Research Center Of Cliniacl Pharmacolo
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Sugiyama Atsushi
Department Of Chemistry College Of Science Rikkyo University
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Sugiyama Atsushi
Department Of Pharmacology School Of Medicine Toho University
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HASHIMOTO Keitaro
Department of Pharmacology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi
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HASHIMOTO Keitaro
Department of Phamacology, Yamanashi Medical University
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Sugiyama Atsushi
Department of Biotechnology, Faculty of Engineering, Kansai University
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