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胺碘酮药代动力学和电生理特性及其临床意义 被引量:22

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摘要 胺碘酮为高脂溶性药物,在小肠被动吸收,高脂饮食能增加其吸收。在体内呈三室开放模型分布,所达稳态时间及消除半衰期均很长,多种因素如性别、年龄、体重等均影响其分布和清除,故用药应个体化。胺碘酮在肝脏通过细胞色素氧化酶(CYP)代谢。口服胺碘酮的主要药效物是去乙基胺碘酮(DEA),而静脉胺碘酮主要以原药形式发挥作用。DEA对快反应心肌细胞作用强,而胺碘酮对慢反应心肌细胞作用强。故静脉胺碘酮控制心房颤动心室率较好,而口服转复效果好,并能有效抑制室性心动过速。由于很多药物通过肝脏CYP代谢。故胺碘酮与这些药物合用时,各药血浓度升高,药理作用会增强,故应注意药物的相互作用。胺碘酮具多通道滞阻的特性,使三层心肌复极均匀延长,致心律失常作用较小。
出处 《中国心脏起搏与心电生理杂志》 北大核心 2009年第6期475-476,共2页 Chinese Journal of Cardiac Pacing and Electrophysiology
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