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Wavelet Denoising as Preprocessing Stage to Improve ICA Performance in Atrial Fibrillation Analysis

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Abstract

Blind Source Separation (BSS) has been probed as one of the most effective techniques for atrial activity (AA) extraction in supraventricular tachyarrhythmia episodes like atrial fibrillation (AF). In these situations, a wavelet transform denoising stage can improve the extraction quality with low computational cost. Each ECG lead is processed to obtain its representation in the wavelet domain where the BSS systems improve their performance. The comparison of spectral parameters (main peak and power spectral density concentration) and statistics values (kurtosis) proves that the sparse decomposition in the wavelet domain of the observed mixtures reduces Gaussian contamination of these signals, speeds up the convergence and increase the quality of the extracted signal. The easy and fast implementation, robustness and efficiency are some of the main advantages of this technique making possible the application in real time systems as a support tool to clinical diagnostics.

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Author information

Authors and Affiliations

  1. Innovation in Bioengineering, Castilla-La Mancha University, Camino del Pozuelo s/n, 16071, Cuenca, Spain

    César Sánchez & Roberto Zangróniz

  2. Bioengineering, Electronics and Telemedicine, Valencia University of Technology, Carretera Nazaret-Oliva s/n, 46730, Gandía, Spain

    José Joaquín Rieta, Carlos Vayá, David Moratal Perez & José Millet

Authors
  1. César Sánchez

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  2. José Joaquín Rieta

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  3. Carlos Vayá

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  4. David Moratal Perez

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  5. Roberto Zangróniz

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  6. José Millet

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Editor information

Editors and Affiliations

  1. Siemens Corporate Research, 755 College Road East, 08540, Princeton, NJ, USA

    Justinian Rosca

  2. Department of CSEE, Oregon Health and Science University, Portland, Oregon, USA

    Deniz Erdogmus

  3. Dep. of Electrical and Computer Engineering, University of Florida, Gainesville, Florida, USA

    José C. Príncipe

  4. McMaster University, 1280 Main Street West, L8S 4K1, Hamilton, Ontario, Canada

    Simon Haykin

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© 2006 Springer-Verlag Berlin Heidelberg

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Sánchez, C., Rieta, J.J., Vayá, C., Perez, D.M., Zangróniz, R., Millet, J. (2006). Wavelet Denoising as Preprocessing Stage to Improve ICA Performance in Atrial Fibrillation Analysis. In: Rosca, J., Erdogmus, D., Príncipe, J.C., Haykin, S. (eds) Independent Component Analysis and Blind Signal Separation. ICA 2006. Lecture Notes in Computer Science, vol 3889. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11679363_61

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