摘要
目的研究心电周期逐拍波动的规律。方法心电周期由电活动期P-T间期(由P-R间期和Q-T间期构成)和电静息期TP段构成。心电周期波动时,各个子波段的时限也波动。本文先通过信号处理方法提取各个波段,然后基于统计学方法研究各子波段波动对总波动的"贡献率"。结果实验结果表明,PP间期的波动主要由TP段的波动引起,而PT间期的波动主要由PR间期的波动引起。结论心电节律波动规律的揭示,利于从更深层次研究心脏的功能和机理。
Objective To investigate the regulation of fluctuation of beat to beat cardiac cycle. Methods A carclio-electric cycle consists of cardio-electric activity called P-T interval and cardio-electric resting TP segment, P-R interval and Q-T interval constitute P-T interval. The cardiac cycles fluctuate along with the time span fluctuation of sub waves and segments. This paper firstly extracted sub waves and segments based on signal processing methods, then discussed the contribution ratio of all waves and segments toward cardiac cycle fluctuation according to statistics. Results Experimental results indicated that the cardiac cycle fluctuation was mainly consistent with the change of TP segment. The P-T interval varied consistently with P-R interval foremost. Conclusion It is revealed that rule of cardiac cycle fluctuation is very useful for further research to figure dut the cardiac function and mechanism.
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2009年第2期126-129,共4页
Space Medicine & Medical Engineering
基金
中国载人航天工程项目资助
关键词
心电图
心率变异性
心动周期
心电周期
舒张期
electrocardiogram （ECG）
heart rate variability
cardiac cycle
cardio-electrie cycle
diastole
