Title :
Study on the optimal order for the auto-regressive time-frequency analysis of heart rate variability
Author :
Carvalho, J.L.A. ; Rocha, A.F. ; Dos Santos, Icaro ; Itiki, C. ; Junqueira, L.F., Jr. ; Nascimento, F.A.O.
Author_Institution :
Dept. of Electr. Eng., Brasilia Univ., Brazil
Abstract :
Time-frequency analysis of heart rate variability (HRV) makes it easier to evaluate how the balance between the sympathetic and parasympathetic influences on heart rhythm varies with time. The auto-regressive model can be used to calculate the power spectrum density of HRV and to create an auto-regressive spectrogram. This work presents these techniques and describes a series of tests performed with the goal of determining the AR order that is more adequate for the calculation of the AR spectrogram. As a result, ranges of optimal orders for different interpolation rates of the HRV signal are presented.
Keywords :
autoregressive processes; cardiology; medical signal processing; spectral analysis; time-frequency analysis; autoregressive model; autoregressive spectrogram; autoregressive time-frequency analysis; heart rate variability; heart rhythm; interpolation rates; optimal order; parasympathetic influences; power spectrum density; Discrete Fourier transforms; Heart rate variability; Interpolation; Performance evaluation; Resonant frequency; Rhythm; Spectral analysis; Spectrogram; Testing; Time frequency analysis;
Conference_Titel :
Engineering in Medicine and Biology Society, 2003. Proceedings of the 25th Annual International Conference of the IEEE
Print_ISBN :
0-7803-7789-3
DOI :
10.1109/IEMBS.2003.1280453
