加速度暴露下的心律失常及其航空医学意义

Cardiac Arrhythmias in Pilots under Positive(+Gz) Acceleration.

目的探讨正加速度 ( +Gz)作用下心血管自主神经调节与心律失常及G耐力的关系。方法对 36名立位耐力不良者和 62名健康飞行员 +Gz作用下的ECG及动态心电图进行对比分析。结果 +Gz作用下 ,立位耐力不良者心律失常发生率高 ,+Gz耐力低。结论 +Gz作用下的心律失常可以作为评价心血管代偿功能及G致意识丧失 (G -LOC)的预警指标。

Objective To study the relationship between cardiac arrhythmias and autonomic nervous regulation in pilots under +Gz acceleration. Method Dynamic ECG during +Gz exposures in 36 orthostatic intolerance pilots and 62 healthy pilots were analysed and compared. Result The orthostatic intolerance pilots had obviously lower +Gz tolerance and more cardiac arrhythmias.The cardiac arrhythmias could affect +Gz tolerance. Conclusion The cardiac arrhythmias under +Gz acceleration could be taken as an index of evaluating cardiovascular compensatory function and warning against acceleration(+Gz) induced loss of consciousness(G LOC).