薯蓣皂苷元对犬急性心肌缺血的影响

目的观察薯蓣皂苷元(MPD)对犬急性心肌缺血的保护作用。方法采用结扎犬冠状动脉前降支的方法,复制犬急性实验性心肌缺血模型。描记心外膜电图,计算心肌缺血程度。硝基四氮唑蓝(N-BT)组织化学染色方法测定心肌梗死面积。放射免疫法测定血浆内皮素(ET)和6-酮前列腺素F1a(6-Keto-PGF1a)、血栓素B2(TXB2)活性的变化,同时测定冠脉血流量。结果MPD可明显改善犬急性心肌缺血(心肌梗塞)的病理表现,减小心肌梗塞范围,减轻心肌缺血程度,扩张冠状动脉,增加心肌供血,同时改善血管内皮细胞的功能。结论MPD具有显著改善犬急性心肌缺血和心肌梗死的作用。

Effect of MPD on Acute Myocardial Ischemia in Dogs

Objective To study the protecitve effect of methy Protodioscin(MPD)on myocardial infarction in dogs. Methods Dog models of myocardial infarction were induced by ligation of coronary artery. The degree of myocardial ischemia was calculated by measuring the epicardial electrogram, and the myocardial infarction area was detected with N-BT histochemistry staining method. The changes of ET, 6-Keto-PGF1a, TXB2 in blood plasma were observed with radioimmunoassay. Meanwhile, the coronary blood flow was measured. Results MPD can obviously relieve the pathological changes of the acute myocardial infarction, decrease the infarction size, reduce the myocardium ischemic degree, dilate the coronary artery , and increase the myocardial blood supply. Meanwhile, MPD can improve the vascular endothelial cell function. Conclusion MPD had obvious effect for relieving acute myocardial infarction in dogs.