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卡维地洛在心肌梗死前及梗死后干预对心肌梗死后大鼠左室重构及心肌细胞凋亡的影响 被引量:4

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摘要 目的:探讨卡维地洛(Carvedilol)预处理对大鼠心肌梗死(MI)后心功能、心梗面积及心肌细胞凋亡的影响。方法:45只雄性SD大鼠随机分为假手术(S)组(15只)、心肌梗死(MI)组(15只)、卡维地洛(C)组(15只),术前1周卡维地洛组给予每天1次卡维地洛10.0mg/kg灌胃处理,MI组和SO组以等量生理盐水灌胃,灌胃1周后前两组采用结扎左冠状动脉前降支的方法建立MI模型,SO组只开胸,在冠状动脉下穿线但不结扎血管。术后24h三组给予手术前相同的处理。建模3周后,采用多道电生理记录仪测定三组大鼠的心率(HR)、平均动脉压(MBP)、收缩压(SBP)、舒张压(DBP)、左室舒张末压(LVEDP)、左室收缩压(LVSP)和左室压力上升和下降的最大速率(±dp/dt);用TTC染色测左室心梗面积;TUNEL染色法检测心肌细胞凋亡比率。结果:3周后,与MI组比较,卡维地洛组HR和LVEDP显著下降,LVSP、±dp/dt及dp/dt/LVSP明显上升;左室梗死面积明显减小及心肌细胞凋亡率明显减少。结论:卡维地洛心肌梗死之前干预可以显著改善大鼠MI后心功能,减少心梗面积及心肌细胞凋亡,进而抑制心室重构。
出处 《陕西医学杂志》 CAS 2012年第11期1459-1461,共3页 Shaanxi Medical Journal
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