Effects of exercise and passive head-up tilt on fractal and complexity properties of heart rate dynamics.

@article{Tulppo2001EffectsOE,
  title={Effects of exercise and passive head-up tilt on fractal and complexity properties of heart rate dynamics.},
  author={Mikko Tulppo and Richard Lee Hughson and Timo Heikki M{\"a}kikallio and K. E. Juhani Airaksinen and Tapio Sepp{\"a}nen and Heikki Huikuri},
  journal={American journal of physiology. Heart and circulatory physiology},
  year={2001},
  volume={280 3},
  pages={H1081-7}
}
tk;1Passive head-up tilt and exercise result in specific changes in the spectral characteristics of heart rate (HR) variability as a result of reduced vagal and enhanced sympathetic outflow. Recently analytic methods based on nonlinear system theory have been developed to characterize the nonlinear features in HR dynamics. This study was designed to assess the changes in the fractal and complexity measures of HR behavior during the passive head-up tilt and during exercise. Fractal exponent… CONTINUE READING
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