title: Estimating coupling directions in the cardiorespiratory system using recurrence properties.
abstract: The asymmetry of coupling between complex systems can be studied by conditional probabilities of recurrence, which can be estimated by joint recurrence plots. This approach is applied for the first time on experimental data: time series of the human cardiorespiratory system in order to investigate the couplings between heart rate, mean arterial blood pressure and respiration. We find that the respiratory system couples towards the heart rate, and the heart rate towards the mean arterial blood pressure. However, our analysis could not detect a clear coupling direction between the mean arterial blood pressure and respiration.
authors.affiliation: Potsdam Institute for Climate Impact Research, 14412 Potsdam, Germany. marwan@pik-potsdam.de
authors.forename: Norbert
authors.initials: N
authors.lastname: Marwan
authors.forename: Yong
authors.initials: Y
authors.lastname: Zou
authors.forename: Niels
authors.initials: N
authors.lastname: Wessel
authors.forename: Maik
authors.initials: M
authors.lastname: Riedl
authors.forename: Jürgen
authors.initials: J
authors.lastname: Kurths
mesh_terms: D000465:Algorithms; D000818:Animals; D001683:Biological Clocks / Q000502:physiology*; D001794:Blood Pressure / Q000502:physiology*; D003198:Computer Simulation; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008954:Models, Biological; D056152:Respiratory Rate / Q000502:physiology*
keywords: cardiorespiratory system; coupling directions; recurrence plots