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Computational and Mathematical Methods in Medicine
Volume 2014, Article ID 217067, 8 pages
Research Article

An Effective Way of J Wave Separation Based on Multilayer NMF

College of Information Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Received 20 June 2014; Revised 25 August 2014; Accepted 1 September 2014; Published 12 October 2014

Academic Editor: Irena Cosic

Copyright © 2014 Deng-ao Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


J wave is getting more and more important in the clinical diagnosis as a new index of the electrocardiogram (ECG) of ventricular bipolar, but its signal often mixed in normal ST segment, using the traditional electrocardiograph, and diagnosed by experience cannot meet the practical requirements. Therefore, a new method of multilayer nonnegative matrix factorization (NMF) in this paper is put forward, taking the hump shape J wave, for example, which can extract the original J wave signal from the ST segment and analyze the accuracy of extraction, showing the characteristics of hump shape J wave from the aspects of frequency domain, power spectrum, and spectral type, providing the basis for clinical diagnosis and increasing the reliability of the diagnosis of J wave.