title: [Research on the Poincare mapping method of T-wave alternans based on morphology].
abstract: This paper introduces an algorithm for detecting T wave alternans (TWA) using Poincare mapping method, which is a technique for nonlinear dynamic systems to display periodic behavior. Vector angle index (VAI) was used to determine the presence or absence of TWA. Adopting MIT/BIH Arrhythmia database and European ECG ST-T database to simulate, we used VAI via poincare mapping method for correlation analysis with Vtwa by way of the spectral method. The cross-correlation coefficient between Vtwa and VAI is gamma = 0.860 1. The algorithm can identify the absence and presence of TWA accurately and provide idea for further study of TWA.
authors.affiliation: College of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Guo
authors.forename: Jie
authors.initials: J
authors.lastname: Zhao
authors.forename: Fei
authors.initials: F
authors.lastname: Li
authors.forename: Tiantian
authors.initials: T
authors.lastname: Li
mesh_terms: D000465:Algorithms; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D003198:Computer Simulation; D004562:Electrocardiography / Q000379:methods*; D006801:Humans; D012815:Signal Processing, Computer-Assisted; D013057:Spectrum Analysis / Q000379:methods*