高+Gz负荷对犬血流动力学的影响  

HEMODYNAMICS FOLLOWING +Gz STRESS IN DOG

作　　者：师绿江[1] 吴家龙[1] 李广道[1] 谈诚[1] 宋蕾[1] 颜桂定[1] 

机构地区：[1]空军航空医学研究所,北京100036

出　　处：《中国应用生理学杂志》2001年第4期376-378,382,共4页Chinese Journal of Applied Physiology

摘　　要：目的 :探讨犬高 +Gz负荷终止后心血管系统血液动力学特征。方法 :9只麻醉犬暴露于 +5Gz、+7Gz、+9Gz负荷各 90s ,用RM 6 0 0 0多导记录仪记录左心室腔内压 ,胸主动脉腔内压 ,髂动脉腔内压 ,每搏颈总动脉血流量和心电图。结果 :① +Gz终止后一段时间内心率快 ,颈总动脉血流量增大 ,心上、中、下水平血压均增高 ,各指标同 +Gz前比较P <0 .0 5 ;②心律失常多见 ,以交界性过早搏动、室性过早搏动为主 ,80 %心律失常发生在 +Gz后 3min内 ;③高 +Gz终止后 2min心血管腔内压呈最高值。结论 :高 +Gz终止后一段时间内心血管系统出现高动力状态 。Aim: To investigate the character of hemodynamics following +Gz stress in dog. Methods: Nine anesthesiaed dogs were exposed to 5,7 and 9 +Gz stress,90 s at peak G. Each animal was instrumented to measure left ventricular pressure,thoracaorta pressure,iliac arterial pressure,common carotid artery flow(CCAF) and ECG. Results: ①Heart rate,CCAF and blood pressure at any place increased. They were greater than those before +Gz stress( P <0.05).②There were much more arrhythmias following high +Gz stress. Most of arrhythmias were junctional premature beats,ventricular premature beats. 80%arrhythmias occurred within 3 min following +Gz stress.③ Blood pressure appeared the highest in the second min following +Gz stress. Conclusion: Great hemodynamic disturbance happened following high +Gz stress. There might were reperfusion arrhythmias. Protective measures should been noted following high +Gz stress.

关 键 词：犬 +Gz负荷 血液动力学 高加速度 

分 类 号：R852.21[医药卫生—航空、航天与航海医学]