Models of Reactions of Human Heart as Nonlinear Dynamic System to Cosmic and Geophysical Factors

• Published in: Bulletin of experimental biology and medicine Vol. 149; no. 4; pp. 490 - 494
• Main Authors: Pipin, V. V, Ragulskaya, M. V, Chibisov, S. M
• Format: Journal Article
• Language: English
• Published: Boston Boston : Springer US 01-10-2010; Springer US; Springer; Springer Nature B.V
• Subjects: Biomedical and Life Sciences; Biomedicine; Cell Biology; Computer Simulation; dynamic systems; Electrocardiogram; Electrocardiography; geophysical factors; heart; Heart - physiology; Humans; Internal Medicine; Laboratory Medicine; Models, Cardiovascular; Nonlinear Dynamics; Pathology; Periodicity; geophysical factors; heart; dynamic systems
• ISSN: 0007-4888; 1573-8221
• DOI: 10.1007/s10517-010-0977-1

The paper analyzes theoretical models of the adaptive modes of generation and stability of human heart as a nonlinear point source. The analysis encompasses only ECG time-domain dynamics. To solve the general problem of the study of the adaptive changes of the cardiosignal under the action of external periodic force and parametric noise, a new dynamic model is proposed, which incorporates two control physical parameters: power of signal generation and coefficient of diffuse signal scattering. For the entire set of parameters, the examined modeled nonlinear system demonstrated a number of various performance modes ranging from steady-state periodic and quasi-periodic states to chaos. The model showed that variations in cosmic, geophysical, and weather conditions in the frequency range of 0.1-0.9 Hz produce the greatest biotropic influence.