title: [Chaos and fractals and their applications in electrocardial signal research].
abstract: Chaos and fractals are ubiquitous phenomena of nature. A system with fractal structure usually behaves chaos. As a complicated nonlinear dynamics system, heart has fractals structure and behaves as chaos. The deeper inherent mechanism of heart can be opened out when the chaos and fractals theory is utilized in the research of the electrical activity of heart. Generally a time series of a system was used for describing the status of the strange attractor of the system. The indices include Poincare plot, fractals dimension, Lyapunov exponent, entropy, scaling exponent, Hurst index and so on. In this article, the basic concepts and the methods of chaos and fractals were introduced firstly. Then the applications of chaos and fractals theories in the study of electrocardial signal were expounded with example of how they are used for ventricular fibrillation.
authors.affiliation: Department of Radiology, Taishan University, Taian 271016, China. jiaoqing71@hotmail.com
authors.forename: Qing
authors.initials: Q
authors.lastname: Jiao
authors.forename: Yongxin
authors.initials: Y
authors.lastname: Guo
authors.forename: Zhengguo
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D004562:Electrocardiography / Q000379:methods*; D017709:Fractals; D006801:Humans; D017711:Nonlinear Dynamics; D012815:Signal Processing, Computer-Assisted; D013269:Stochastic Processes