| Autor: |
Stefanovska, Aneta, Krošelj, Peter, Bračič, Maja, Strle, Sašo |
| Zdroj: |
IFAC-PapersOnLine; March 1997, Vol. 30 Issue: 2 p7-12, 6p |
| Abstrakt: |
The paper presents reconstruction of cardiovascular dynamics based on analysis of signals measured from various functions of the cardiovascular system on different sites of the human body. All signals comprise the same characteristic peaks in their frequency spectra. The time variations of these peaks are illustrated using wavelet transform. To further reveal the dynamic properties of the cardiovascular system the signals are analysed in the phase space by calculating the correlation integral and Lyapunov exponents. The correlation integrals of measured signals differ from those of their surrogates, and the Lyapunov exponents appear in pairs. The obtained results suggest the complex and deterministic nature of the system that governs cardiovascular dynamics. A model of coupled oscillators is proposed to describe the dynamics of the cardiovascular system. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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