Abstract:

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.

Key words: pulse transit time variability; LZ complexity; binarization method; heart rate variability