Time-frequency analysis of 24-hour heart rate fluctuation for the characterization of very low-frequency component

Hsiao Lung Chan, Jiunn Lee Lin, Chao Cheng Du, Chien Ping Wu

Research output: Contribution to journalConference article


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.

Original languageEnglish
Pages (from-to)1250-1251
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Issue numberpt 2
Publication statusPublished - Dec 1 1994
Externally publishedYes
EventProceedings of the 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1 (of 2) - Baltimore, MD, USA
Duration: Nov 3 1994Nov 6 1994


ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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