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首页> 外文期刊>PACE: Pacing and clinical electrophysiology >Proarrhythmic effects of ibutilide in a canine model of pacing induced cardiomyopathy.
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Proarrhythmic effects of ibutilide in a canine model of pacing induced cardiomyopathy.

机译:脂蛋白在起搏诱导心肌病的犬模型中的预训练作用。

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The authors developed a canine model of pacing induced cardiomyopathy to study the possible mechanisms of ibutilide induced torsades de pointes (TP) in heart failure. Thirteen dogs received intravenous ibutilide after acute AV block for 60 minutes, and after implantation of a VVI pacemaker, with a rate of 270 beats/min for 2-3 weeks. Twelve-lead ECG and right and left ventricle monophasic action potentials were recorded at different right ventricle pacing cycle lengths from 600 ms to 1200 ms during the study. The results showed ibutilide could significantly prolong ventricular repolarization and increase the dispersion in a dose dependent and reverse use dependent manner. Furthermore, after ibutilide administration, cardiomyopathic dogs had a greater dispersion of ventricular repolarization, and also had higher incidences of early afterdepolarizations and spontaneous or pacing induced TP than acute AV block dogs.
机译:作者开发了一种起搏诱导心肌病的犬模型,以研究脂蛋白诱导的扭转曲线(TP)在心力衰竭中的可能机制。 13只狗在急性AV嵌段后接受静脉注射脂蛋白60分钟,并在植入VVI起搏器后,速率为270次/分钟,2-3周。 在研究期间,在不同的右心室起搏周期长度为600 ms至1200ms,在不同的右心室起搏周长度记录12个引出的ECG和左右和左心室单表。 结果表明,脂蛋白可以显着延长心室再渗透,并在剂量依赖性和反向使用依赖性方式中增加分散体。 此外,在冻虫酰基施用后,心肌病犬具有更大的心室复极性分散,并且还具有比急性AV嵌段狗更高的早期后次升高和自发性或起搏的发病率。

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