Antifibrillatory actions of bepridil and butyl-MDI, two intracellular calcium antagonists.
Antifibrillatory actions of bepridil and butyl-MDI, two intracellular calcium antagonists.
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贝普地尔和丁基 MDI(两种细胞内钙拮抗剂)的抗纤维颤动作用。
DOI:
10.1016/0014-2999(85)90107-4
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发表时间:
1985
影响因子:
5
通讯作者:
Lucchesi,BR
中科院分区:
文献类型:
--
作者:
Lynch,JJ;Rahwan,RG;Lucchesi,BR
The antifibrillatory and electrophysiologic actions of bepridil and butyl-methylenedioxyindene (BU-MDI), two intracellular calcium antagonists, were examined in anesthetized dogs. The administration of bepridil (1.0–10.0 mg/kg i.v.) significantly increased the electrical threshold for ventricular fibrillation determined during unobstructed coronary flow, and was associated with a significant decrease in ventricular excitability and a progressive depression in ventricular myocardial conduction. BU-MDI (3.0–30.0 mg/kg i.v.) did not significantly alter ventricular fibrillation thresholds during unobstructed coronary flow, nor did it significantly alter electrophysiologic properties such as ventricular excitability, conduction or refractoriness. The administration of either bepridil (10 mg/kg i.v.) or BU-MDI (30 mg/kg i.v.), however, resulted in significant increases in the ventricular fibrillation thresholds determined during transient myocardial ischemia, restoring the threshold values to corresponding non-ischemic levels. These results suggest that an inhibition of the action and/or availability of intracellular calcium may play a role in the antifibrillatory actions of BU-MDI and bepridil during transient ischemia.
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