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.
|頁（從 - 到）||1250-1251|
|期刊||Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings|
|出版狀態||已發佈 - 12月 1 1994|
|事件||Proceedings of the 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1 (of 2) - Baltimore, MD, USA|
持續時間: 11月 3 1994 → 11月 6 1994
ASJC Scopus subject areas