分形维数在头低位期间心率变异分析中的应用

发布时间：2018-03-19 01:00

本文选题：失重模拟　切入点：心率变异性　出处：《航天医学与医学工程》2005年01期 　论文类型：期刊论文

【摘要】：目的将分形维数应用于心率变异性分析,分析头低位实验过程中心血管系统的非线性变化趋势。方法对10名被试者进行头低位模拟失重实验,每个人前后做2次,共20组实验数据,记录心电信号并用分形维数进行分析。结果与平卧位相比,头低位15～20min、20～25min、25～30min和恢复期的R R间期的标准差显著升高;头低位20～25min的相邻R R间期差值的均方根显著升高;头低位0～5min、5～10min、10～15min、20～25min、25～30min和恢复期的分形维数显著高于平卧位。结论头低位期间心率变异性升高,心血管系统复杂性升高;分形维数应用于心率变异性的分析是可行的。
[Abstract]:Objective to apply fractal dimension to the analysis of heart rate variability and to analyze the trend of nonlinear changes of cardiovascular system in head-low experiment. Methods Ten subjects were tested with head-low simulated weightlessness twice before and after the head-down experiment. 20 groups of experimental data were recorded and analyzed with fractal dimension. Results compared with supine position, the standard deviation of R interval in head-low 1520min, 20min 20min, 25min 25min 2530min and convalescence period was significantly higher than that in supine position. The root mean square (RMS) of the R-interval difference between the two groups was significantly higher than that in the supine position, and the fractal dimension in the head-low position was significantly higher than that in the supine position, and the mean square value of the R-R interval was significantly higher in the head-low position than in the supine position. Conclusion during the head-low period, the heart rate variability increased, and the cardiovascular system complexity increased, and the fractal dimension of the head low position was significantly higher than that in the supine position. It is feasible to apply fractal dimension to the analysis of heart rate variability.
【作者单位】：航天医学工程研究所航天医学工程研究所航天医学工程研究所航天医学工程研究所
【基金】：中国载人航天项目基金资助
【分类号】：R85

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