摘要
心动周期信号（ＨＰＳ）具有混沌特征，携带有自主神经功能信息。ＨＰＳ的功率谱分析可以定量地评价交感、副交感神经活动的强弱及其相互作用。这种方法是测试自主神经系统功能的现代方法。我们利用自行研制的计算机化心动周期信号混沌分析系统，对２１７例正常人的心动周期信号进行了功率谱分析。本文介绍了研究中采用的功率谱指标（Ｐｖｖ、Ｐｌｖ、Ｐｈｖ、Ｐｖｒ、ＰｌｒＰｈｒ、Ｒｖｈ、Ｒｌｈ、Ｔｆｐ），频率指标（Ｖｆｍ、Ｌｆｍ、Ｈｆｍ、ｆｍ、ｆｏ）和混沌度Ｌｏｃ的意义以及它们与年龄的关系。研究表明，随着年龄的增加，交感活动加强，副交感的活动减弱，心脏的混沌程度逐步降低。５０岁左右，有些指标的变化趋势与其它年龄段明显不同。
The heart period signal(HPS)has chaotic characteristics and it carries information about auto-nomic nervous system funtion.The power spectrum analysis of HPS can quantify the activities of sympatheticnerve and parasympathetic nerve and their interaction,it is a modern method to test the autonomic nervous sys-tem function,The computerized system analysing chaotic characteristics of HPS,which was made in our labora-try,were used to study the power spectrum of HPS taken from 271 normal subjects,This paper introduces themeanings of power indexes(Pvv、Plv、Phv、Pvr、Plr、Phr、Rvh、Rlh、Tfp),frequency indexes (Vfm、Lfm、Hfm、fm、fo)and chaosness(Hcv,Hcl.Hch,Lcc),and studies the relation between these indexes and age,The results point-ed out that while age increased.the activity of sympathetic nerve increased and the activity of parasympathetic de-creased,that is,the chaosness of heart is gradually decreased.For the 50 group,the varying trend of some index-es was different from other age groups.
出处
《中国医学物理学杂志》
CSCD
1996年第2期109-113,共5页
Chinese Journal of Medical Physics
基金
四川省教委和卫生部科研基金
关键词
心动周期信号
混沌度
功率指标
功率谱分析
The heart period signal Chaosness Autonomic nervous system funtion Power indexes Power spectrum analysis Frequency indexes
