平行秋千摆动刺激中的心率变异分析

目的 观察飞行员在平行秋千摆动前、中、后反映心脏植物神经调节功能的心率变异性（ＨＲＶ）特点，搪塞以此评价线性加速度作用下前庭＝植物神经反应性的可能性。方法记录３７名飞行员在秋千摆动前、中、后的连续心电图，进行频率谱分析并计算低频成分（ＬＦ）和高频成分（ＨＦ）之幽会对被试者中ＬＦ／ＨＦ值在不同摆动阶段变化类型及分布耐受摆动时间的关系进行初步分析。结果 摆动中的ＬＦ明显降低，ＨＦ明显增高，ＬＦ／ＨＪＦ

Analysis of Heart Rate Variability during Parallel Swinging

Objective: To study the pilots' heart rate variability (HRV) characteristic before, during and after parallel swing and the possibility of evaluating vestibule-vegetative nervous reaction under linear acceleration. Method: 37 healthy male pilots participated in parallel swing test. Dynamic ECG was recorded for 15 min before, during and after swing, using model MR-4500 Holter recorder. All spectra were estimated from 15 min HRV by autoregressive (AR) modeling method, the model order (8-15) was chosen using automatic program. The ratio of lower-frequency (LF) to high-frequency (HF) power of HRV spectrum (LF/HF) was computed. The relation between change of those ratios in different swing stage and swing time was analysed. Result: Ratio of LF to HF during swing was markedly lower than those of before and after swing (P<0.01). Conclusion: The vagal nervous activity was markedly increased during swing. There were complexity and versatility in the heart automatic nervous regulation before, during and after swing.