[The detection of non-stationary T-wave alternans: a modified correlation method].
T-wave alternans (TWA) refers to a phenomenon appearing in the surface electrocardiograph (ECG) as a consistent fluctuation in morphology and amplitude of the T wave on an "every-other-beat" basis. Correlation method (CM) has a certain ability to detect the non-stationary TWA, but it is very sensitive to noise. In this paper we propose a modified correlation method to ensure a stable and accurate detection of non-stationary TWA. Compared to the CM, the method modifies the judge condition and uses the linear fitting to limit the noise to gain the ability of detecting of non-stationary TWA. Our simulation and clinical data assessment study demonstrates the improved performance of the proposed algorithm.
Information Engineering College, Guangdong University of Technology, Guangzhou 510006, China.
Kanghui
K
Yan
Xiangkui
X
Wan
Minggui
M
Li
Dingcheng
D
Xiang
D000465:Algorithms; D016477:Artifacts; D003198:Computer Simulation; D004562:Electrocardiography / Q000379:methods*; D006801:Humans; D012815:Signal Processing, Computer-Assisted; D058067:Wavelet Analysis