氯吡格雷抵抗的研究进展(3)
时间:2025-07-09
时间:2025-07-09
研究进展
1107
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伊布利特的心脏电生理作用及临床应用
孙俊波屈百呜
伊布利特(ibutilide)是一种新型的Ⅲ类抗心律失常药物,但和其他Ⅲ类抗心律失常药物相比又有其独特的心脏电生理作用。它仅能经静脉途径给药,其分子结构似索他洛尔(sotal01),能快速有效地终止心房颤动(AF)和心房扑动(AFL)…,其转复AF和AFL的有效率高于索他洛尔和普鲁卡因胺(procainamide)怛1。它因能在体内经肝脏快速
特的此类作用可能与lkr是窦房结细胞II【的组成部分,通过阻滞lkr以抑制窦房结的功能有关。
2.2对心房肌的作用伊布利特能延长心肌细胞的有效不应期,其对心房的作用比心室更为明显。Bashin等”5在离体白鼬心房心室细胞试验中证实该药能更加有效地延长心房有效不应期(AERP),提示其终止房性心律失常的效果可能比终止室性心律失常的效果更好。Cheng¨02002年报道12例AF/AFL患者,在静脉注射伊布利特2mg后15min,AFL周长和心房有效不应期均有明 …… 此处隐藏:670字,全部文档内容请下载后查看。喜欢就下载吧 ……
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