Heart rate variability and fractal dimension during orthostatic challenges.

@article{Butler1993HeartRV,
  title={Heart rate variability and fractal dimension during orthostatic challenges.},
  author={Gary C. Butler and Yoshie Yamamoto and Hua Cheng Xing and David R. Northey and Richard L. Hughson},
  journal={Journal of applied physiology},
  year={1993},
  volume={75 6},
  pages={2602-12}
}
Heart rate variability (HRV) spectral analysis has been used as a tool for short-term assessment of parasympathetic (PNS) and sympathetic nervous system (SNS) control of heart rate. However, it has been suggested that the PNS and SNS indicators are superimposed on a broad-band noise spectrum in which the power spectral densities are inversely proportional to their frequency (1/f beta). In this study, we have used coarse-graining spectral analysis to extract the harmonic components for… CONTINUE READING

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