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首页> 外文会议>Computers in cardiology 1995 >Spectral Analysis of Heart Rate Variability Signal Induced by Noninvasive Modulation of Venous Return
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Spectral Analysis of Heart Rate Variability Signal Induced by Noninvasive Modulation of Venous Return

机译：无创调制静脉回流引起心率变异性信号的频谱分析

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This paper describes a simple device designed to modulate central venous return and to evaluate its effect on the heart rate variability (HRV) signal. The device consists of four cuffs, placed on the arm and leg radices, which are cyclically inflated at 40 mmHg pressure and then deflated. Twenty-eight normal subjects were studied in supine position. The experiment consisted of four periods lasting ten minutes each. The first was a controlled breathing period (CB6=6 breaths/min), the second was CB6 and venous return modulation at 15 cycles/min (VRM15). The third was a controlled breathing period at 15 breaths/min (CB15), and the fourth was CB15 and VRM at 6 cycles/min (VRM6). The heart period, respiratory signal, systolic and diastolic blood pressure were monitored during the experiment. Auto- and cross-spectral analysis was carried out on the resulting time series. The results show that Total Power, LF, HF and LF/HF significantly increased only in the CB15 & VRM6 (compared to the CB15) period. In conclusion VRM appears to influence the HR V signal in the low but not in the high frequency.
机译：本文介绍了一种简单的设备，旨在调节中心静脉回流并评估其对心率变异性（HRV）信号的影响。该装置由四个袖带组成，分别放在手臂和腿部的半径上，以40 mmHg的压力周期性充气，然后放气。对二十八个正常受试者的仰卧位进行了研究。实验由四个持续10分钟的周期组成。第一个是控制呼吸周期（CB6 = 6呼吸/分钟），第二个是CB6和以15个周期/分钟的静脉回流调制（VRM15）。第三个是以15次呼吸/分钟（CB15）的受控呼吸周期，第四个是以6个循环/分钟（VRM6）的CB15和VRM。在实验过程中监测心律，呼吸信号，收缩压和舒张压。对所得的时间序列进行自动和互谱分析。结果表明，总功率，LF，HF和LF / HF仅在CB15和VRM6（与CB15相比）期间显着增加。总之，VRM似乎在低频而不是高频上影响HR V信号。

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