TY - JOUR
T1 - Time-frequency analysis of 24-hour heart rate fluctuation for the characterization of very low-frequency component
AU - Chan, Hsiao Lung
AU - Lin, Jiunn Lee
AU - Du, Chao Cheng
AU - Wu, Chien Ping
PY - 1994/12/1
Y1 - 1994/12/1
N2 - A smooth pseudo Wigner-Ville distribution was employed to investigate both time and frequency characteristics in very low-frequency component (less than 0.04 Hz) of 24-hour heart rate fluctuation. In some of heart failure, we could see remarkable and very low-frequency oscillations on the Wigner-Ville distribution, which are related to Cheyne-Stokes respiration. However, the Wigner-Ville distribution of normal subjects had not such oscillations, but more random spectral characteristics instead. Furthermore, we calculated 1/fα regression slopes of average spectrum to be a crude estimate of fractal dimensions. The slopes are more negative in heart failure than normal (-1.866 ± 0.888 vs. -0.957 ± 0.180 p < 0.005), which associates a loss of dimensionality of heart rate fluctuation in heart failure.
AB - A smooth pseudo Wigner-Ville distribution was employed to investigate both time and frequency characteristics in very low-frequency component (less than 0.04 Hz) of 24-hour heart rate fluctuation. In some of heart failure, we could see remarkable and very low-frequency oscillations on the Wigner-Ville distribution, which are related to Cheyne-Stokes respiration. However, the Wigner-Ville distribution of normal subjects had not such oscillations, but more random spectral characteristics instead. Furthermore, we calculated 1/fα regression slopes of average spectrum to be a crude estimate of fractal dimensions. The slopes are more negative in heart failure than normal (-1.866 ± 0.888 vs. -0.957 ± 0.180 p < 0.005), which associates a loss of dimensionality of heart rate fluctuation in heart failure.
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M3 - Conference article
AN - SCOPUS:0028756673
SN - 0589-1019
VL - 16
SP - 1250
EP - 1251
JO - Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
JF - Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
IS - pt 2
T2 - Proceedings of the 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1 (of 2)
Y2 - 3 November 1994 through 6 November 1994
ER -