Volume 62, Number 2, April 2003
|Page(s)||147 - 153|
|Published online||01 April 2003|
Modeling transient correlations in heartbeat dynamics during sleep
Center for Polymer Studies
and Department of Physics, Boston University Boston, MA 02215, USA
2 Gonda-Goldschmied-Center and Department of Physics, Bar-Ilan University Ramat-Gan 52900, Israel
3 Beth Israel Deaconess Medical Center, Harvard Medical School Boston, MA 02215, USA
Accepted: 16 February 2003
We propose a model to generate stochastic signals with transient correlations, i.e. correlations of different strength and different typical duration within finite segments of the signal. The exponents and crossovers characterizing the correlations in the signal and in its variance can be tuned independently and allow us to generate model time series which are in agreement with data of heartbeat dynamics observed during wake and during different sleep stages. We also propose a model dynamics that reproduces the changes in the heartbeat fluctuations during the entire night, including transitions between different sleep stages.
PACS: 02.50.Ey – Stochastic processes / 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 87.19.Hh – Cardiac dynamics
© EDP Sciences, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.