Nonlinear and chaos characteristics of heart period time series: healthy aging and postural change.

@article{Vuksanovi2005NonlinearAC,
  title={Nonlinear and chaos characteristics of heart period time series: healthy aging and postural change.},
  author={Vesna Vuksanovi{\'c} and Vera Gal},
  journal={Autonomic neuroscience : basic & clinical},
  year={2005},
  volume={121 1-2},
  pages={94-100}
}
In this study we investigated nonlinear and linear characteristics of heart period variability with aging in supine and standing posture. Sixty healthy subjects (8-61 years) divided in three age groups participated in the study. Heart period variability was assessed by measurement of short-term scaling exponent, sample entropy, largest Lyapunov exponent and spectral low-frequency and high-frequency power. In standing, there was significant increase in short-term scaling exponent and largest… CONTINUE READING

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