3 citations · 3 across the 1 of their papers we have counts for
3 papers
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
What does the correlation dimension of the human heart rate measure?
M. Sakki, J. Kalda, M. Vainu +1
It is shown that in the case of human heart rate, the scaling behaviour of the correlation sum (calculated by the Grassberger-Procaccia algorithm) is a result of the interplay of v…
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…