血管迷走神经性晕厥的自主神经控制通过心率波动的频谱和时间依赖性分析进行研究

A. Baharav, L. Kesselbrenner, O. Oz, T. Lehrman-Sagie, S. Akselrod
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引用次数: 1

摘要

应用心率波动谱分析探讨自主神经系统在血管迷走神经性晕厥发病机制中的作用。对反复发作的不明原因晕厥患者和正常对照进行了研究,分别采用仰卧位和60/spl度/抬头倾斜位,作为反射性神经心源性晕厥倾向的测试。在平均心率、收缩压、舒张压和脉压的生理变化的背景下分析心率变异性。为了研究实验中的非平稳周期,提出了一种时间相关分析方法,并在某些情况下加以应用。结果与患者交感神经储备较低一致。作者还得出结论,长时间的直立压力可能会引起正常年轻受试者的反射性昏厥
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The autonomic control in vasovagal syncope investigated by spectral and time-dependent analysis of heart rate fluctuations
Spectral analysis of heart rate fluctuations was used to investigate the role of the autonomic nervous system in the pathogenesis of vasovagal syncope. Patients with recurrent episodes of unexplained syncope and normal controls were studied in supine and in 60/spl deg/ head-up tilt position applied as a test of the propensity to reflex neurocardiogenic syncope. Heart rate variability was analyzed in the context of physiological changes in mean heart rate, systolic and diastolic blood pressure and pulse pressure. In order to study nonstationary periods during the experiment a time dependent analysis was developed and applied in some cases. The results are consistent with a lower sympathetic reserve in patients. The authors concluded also that prolonged orthostatic stress may induce reflex fainting in normal young subjects.<>
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