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physics.med-ph2003★ 3 cited
Non-linear and scale-invariant analysis of the Heart Rate Variability
J. Kalda, M. Sakki, M. Vainu +1
Human heart rate fluctuates in a complex and non-stationary manner. Elaborating efficient and adequate tools for the analysis of such signals has been a great challenge for the res…
physics.med-ph2001
Zipf's law in human heartbeat dynamics
J. Kalda, M. Sakki, M. Vainu +1
It is shown that the distribution of low variability periods in the activity of human heart rate typically follows a multi-scaling Zipf's law. The presence or failure of a power la…