Band-phase-randomized surrogate data reveal high-frequency chaos in heart rate variability

@article{Li2010BandphaserandomizedSD,
  title={Band-phase-randomized surrogate data reveal high-frequency chaos in heart rate variability},
  author={Cheng Bin Li and Guang-hong Ding and Guo-Qiang Wu and C. C. Poon},
  journal={2010 Annual International Conference of the IEEE Engineering in Medicine and Biology},
  year={2010},
  pages={2806-2809}
}
We propose a new band-phase-randomized surrogate data method to evaluate the chaotic dynamics in the high (HF) and low frequency (LF) bands of heart rate variability (HRV) in healthy subjects. The chaotic strength of normal HRV as assessed by a noise titration assay completely vanished when its power spectrum was phase-randomized over the entire frequency band or the HF band alone, but not the LF band alone. This finding confirms recent evidence that chaotic dynamics in normal HRV is ascribable… CONTINUE READING