八厘麻毒素改造剂对麻醉大鼠的血流动力学及电生理作用

Effects of Rh2 on cardiac hemodynamics and electrophysiological parameters in anesthetic rats

目的探讨八厘麻毒素改造剂(Rh2)对麻醉正常血压大鼠的血流动力学及电生理参数的影响。方法给予不同剂量的Rh2后,测定心脏的血流动力学及电生理参数(SAP、DAP、MAP、LVSP、LVDP、LVEDP、±dp/dtmax、HR、VRRP、VERP)。结果Rh2明显升高血压,增加左心室内压及左心室内压变化速率最大值、降低左心室终末舒张压,对心率、心电图(ECG)及心室不应期无明显影响。结论Rh2明显升高血压同时,不影响心率、ECG及心室电生理,提示其升压作用可能与增加血管外周阻力有关。

Aim To observe the effects of Rh2 on the hemodynamics and electrophysiological parameters in anesthetic rats. Methods The changes of hemodynamics and electrophysiological parameters in anesthetic rats were tested after administration with Rh2, such as SAP, DAP, MAP, LVSP, LVDP, LVEDP, ±dp/dt_ max,HR,RRP and ERP. Results Rh2 increased SAP,DAP,MAP,LVSP,±dp/dt_ max with the decrease of LVEDP. It had no distinct effects on HR, ECG, RRP and ERP. Conclusion Rh2 has the effects of increasing SAP,DAP and MAP in anesthetic rats and has no influence on HR, ECG and cardiac ventricle electrophysiological parameter, suggesting that the effect of increasing blood pressure could be related to the increases of peripheral resistance.