France C
Department of Psychology, Ohio University, Athens 45701-2979, USA.
Int J Psychophysiol. 1995 Feb;19(1):13-22. doi: 10.1016/0167-8760(94)00058-m.
Baroreflex sensitivity was assessed at rest and during constrictive pain in healthy males with and without a history of vasovagal reactions to blood donation. Continuous recordings of cardiac inter-beat interval and finger arterial pressure were obtained at rest and during repeated presentations of constrictive thigh-cuff stimulation. Baroreflex sensitivity (in msec/mm Hg) was computed according to the spontaneous sequence analysis method. Results indicated that vasovagal reactors exhibited significantly lower descending baroreflex sensitivity across all periods, and significantly lower ascending baroreflex sensitivity at rest. Baseline differences in ascending baroreflex sensitivity were eliminated during thigh-cuff stimulation, as vasovagal reactors exhibited increases in ascending baroreflex sensitivity while non-reactors exhibited decreases. These findings suggest that susceptibility to vasovagal reactions may be associated with individual differences in baroreflex sensitivity.
在有和没有献血血管迷走神经反应史的健康男性中，于静息状态和收缩性疼痛期间评估压力感受性反射敏感性。在静息状态以及反复进行大腿袖带收缩刺激时，连续记录心脏搏动间期和手指动脉压。根据自发序列分析法计算压力感受性反射敏感性（单位为毫秒/毫米汞柱）。结果表明，血管迷走神经反应者在所有时间段的降压压力感受性反射敏感性均显著较低，且在静息时的升压压力感受性反射敏感性也显著较低。在大腿袖带刺激期间，升压压力感受性反射敏感性的基线差异消失，因为血管迷走神经反应者的升压压力感受性反射敏感性增加，而非反应者则降低。这些发现表明，血管迷走神经反应的易感性可能与压力感受性反射敏感性的个体差异有关。
