离子浓度对离体大鼠心脏再灌注性心律失常的影响

INFLUENCES OF PERFUSATE ION CONCENTRATION ON REPERFUSION ARRHYTHMIAS IN LANGENDORFF HEART OF RATS

用正交设计方法研究发现在Langendorff大鼠心脏,灌流液中低钾、高钙、低镁所致再灌注性室颤发生率最高:钾、钙离子间交互作用也显著影响再灌注性室颤发生率和潜伏期。因此,可认为灌流液中钾、钙、镁离子的适宜比例是诱发Langendorff大鼠心脏再灌注性心律失常模型的重要因素之一。

Using method of orthogonal design we observed that low K+,high Ca2+ & low Mg2+ in perfusate produced the peak incidence of reperf-usion-indaced ventricular fibrillation & introduction of K+ & Ca2+ significantly affected the incidence & pnset of it, The appropriate prop-ortion of K+, ea2+ & Mg2+ in perfusate is the important effecting factor of reperfusion-induced arrhythmias in Langendorff heart of rats.