DocumentCode :
471611
Title :
Effect of considering constant variance time-frequency autoregressive models for HRV analysis
Author :
Gaitan-Gonzalez, Mercedes J. ; Carrasco-Sosa, Salvador ; Gonzalez-Camarena, Ramon ; Yanez-Suarez, Oscar
Author_Institution :
Dept. de Ciencias de la Salud, Univ. Autonoma Metropolitana Iztapalapa, Mexico City
fYear :
2006
fDate :
Aug. 30 2006-Sept. 3 2006
Firstpage :
1792
Lastpage :
1795
Abstract :
Time-varying autoregressive modeling may consider the driving noise variance as a constant. In this work, the properties of the autoregressive driving noise variance of heart rate variability, with different stationary physiological conditions (resting in supine and sitting; exercise) are obtained. The effect of constant variance consideration for ramp exercise and recovery (a nonstationary condition) is also evaluated by the comparison of the time-varying absolute spectral parameters obtained by parametric estimation, allowing or not the modeling of time-varying noise variance, and a non-parametric time-frequency analysis. The driving noise variance presented a direct non-linear relationship with the heart period for the stationary maneuvers (r=0.91), while for the nonstationary condition, the use of a constant driving noise resulted in bias for the estimation of heart rate variability spectral parameters. A time-varying driving noise variance should be considered
Keywords :
autoregressive processes; electrocardiography; medical signal processing; parameter estimation; physiological models; spectral analysis; time-frequency analysis; autoregressive driving noise variance; constant variance effect; heart rate variability analysis; parametric estimation; ramp exercise; time-frequency autoregressive model; time-varying absolute spectral parameters; time-varying driving noise variance; Analysis of variance; Autonomic nervous system; Cities and towns; Electronic mail; Filters; Heart rate variability; Spectral analysis; Steady-state; Time frequency analysis; USA Councils;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society, 2006. EMBS '06. 28th Annual International Conference of the IEEE
Conference_Location :
New York, NY
ISSN :
1557-170X
Print_ISBN :
1-4244-0032-5
Electronic_ISBN :
1557-170X
Type :
conf
DOI :
10.1109/IEMBS.2006.260513
Filename :
4462122
Link To Document :
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