分形维数在头低位期间心率变异分析中的应用

被引：5

作者：

梁仲刚

严洪

吴斌

吴萍

机构：

[1] 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北京,北京,北京,北京

来源：

航天医学与医学工程 | 2005年 / 01期

关键词：

失重模拟; 心率变异性; 分形维数; 头倒位倾斜;

D O I：

10.16289/j.cnki.1002-0837.2005.01.014

中图分类号：

R85 [航空航天医学];

学科分类号：

1001 ; 100106 ;

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。

引用

页码：58 / 61

页数：4

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