基于LZ复杂度的脉搏传播时间变异性分析

针对传统脉搏传播时间获取不够准确的缺陷,建立了一种基于信号生理意义的心 桡脉搏传播时间(h-rPTT)获取方法,准确获取到h-rPTT序列.同时对LZ复杂度算法中的二值化方法进行了改进,提出一种基于移动窗口均值的二值化方法.依据LZ复杂度算法中二值化方法的不同,定义了3种复杂度D1、D2、D3,利用D1、D2、D3对30例正常组和高血压组受测者进行了对比分析,结果表明基于移动窗口均值的LZ复杂度D3对正常组和高血压组的区分度最好.

Analysis of pulse transit time variability based on LZ complexity

Aiming at the problem that the traditional method for calculating pulse transit time (PTT) is not accurate, a new method for calculating heart radial pulse transit time (h rPTT) based on the signal physiological significance is proposed. It can accurately acquire the h rPTT sequence. At the same time, the research improves the binarization method in the LZ complexity algorithm and itproposes a new binarization method based on the moving window mean value. Based on the different binarization methods in LZ complexity algorithm, the research defines three kinds of the LZ complexity named D1, D2 and D3. Using the three LZ complexities, JP2]it analyses 30 cases of the normal group and hypertension group. The results show that the LZ complexity D3, which is based on the moving window mean value, can give the best discrimination of the normal group and hypertension group.