The Effect of Flunarizine and Ryanodine on Acquired Torsades de Pointes Arrhythmias in the Intact Canine Heart

The Effect of Flunarizine and Ryanodine on Acquired Torsades de Pointes Arrhythmias in the Intact Canine Heart
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氟桂利嗪和瑞尼定对完整犬心脏获得性尖端扭转型室性心律失常的影响

DOI:
10.1111/j.1540-8167.1995.tb00770.x
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发表时间:
1995
影响因子:
2.7
通讯作者:
H. Wellens
H. Wellens
中科院分区:
医学3区
文献类型:
--
作者:
S. C. Verduyn;M. Vos;A. Gorgels;J. Zande;J. Leunissen;H. Wellens

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氟桂利嗪和兰尼定治疗获得性TdP简介:Ryanodine(肌浆网Ca2+释放通道的特异性阻断剂)和氟桂利嗪([Ca2+]超载阻断剂)对延迟后除极(DAD)和DAD依赖性心律失常具有抗心律失常作用。关于其对早期后去极化(埃兹)的影响存在体外争议:没有报道对铯诱导的埃兹有影响,而兰尼定确实可以预防异丙肾上腺素诱导的埃兹。为了研究细胞内Ca2+超载在获得性EAD依赖性尖端扭转型室性心动过速(TdP)心律失常中的可能作用,我们在TdP动物模型中检测了氟桂利嗪和兰尼定的作用。
Flunarizine and Ryanodine in Acquired TdP. Introduction: Ryanodine, a specific blocker of the Ca2+ release channel of the sarcoplasmic reticulum, and flunarizine, a[Ca2+], overload blocker, possess antiarrhythmic effects against delayed after depolarizations (DADs) and DAD‐dependent arrhythmias. In vitro controversy exists about their effect on early after depolarizations (EADs): no effect was reported on cesium‐induced EADs, while ryanodine did prevent EADs induced by isoproterenol. To study the possible role of intracellular Ca2+ overload in acquired EAD‐dependent torsades de pointes (TdP) arrhythmias, we tested the effects of flunarizine and ryanodine in our animal model of TdP.
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