title: [Analysis of nonlinear behavior in cardiac QRS-waves integral].
abstract: QRS-waves integral can reflect the activities of ventricular depolarization. In this paper are analyzed the nonlinear characters in QRS-waves integral: reconstructing state space with these integral signals after nonlinear noise reduction, calculating its attractor dimension and the largest Lyapunov exponents. With the results based on MIT-BIH database we proposed that QRS-waves integral is of chaos nature. When compased with HRV nonlinear analysis, QRS-waves integral analysis was found to be of more advantages in some cases such as premature ventricular contraction. This QRS-waves integral nonlinear analysis may be of use in evaluating clinical cardiac function.
authors.affiliation: Department of Engineering Physics, Tsinghua University, Beijing 100084, China.
authors.forename: Rongfeng
authors.initials: R
authors.lastname: Yang
authors.forename: Yixiang
authors.initials: Y
authors.lastname: Wei
mesh_terms: D004562:Electrocardiography; D006801:Humans; D017711:Nonlinear Dynamics; D012815:Signal Processing, Computer-Assisted