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Atrial Fibrillation ECG Signal Processing for QRST Cancellation: Zero-Padding versus Time Alignment

Gholinezhadasnefestani, S, Escalona, OJ, Castro, NC, Nazarzadeh, K, Kodoth, V, Lau, E and Manoharan, G (2012) Atrial Fibrillation ECG Signal Processing for QRST Cancellation: Zero-Padding versus Time Alignment. In: IEEE Andean Region International Conference 2012 (Andescon 2012), Cuenca, Ecuador. IEEE Computer Society. 4 pp. [Conference contribution]

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DOI: 10.1109/Andescon.2012.20

Abstract

In non-invasive analysis of atrial fibrillation (AF), the QRST cancellation is commonly applied by using a time-aligned average over several ECG cycles. This paper proposes another technique with less illusive high frequency content into the residual signal. Firstly the QRS complexes and T-end were detected by Pan-Tompkins's technique and Zhang's algorithm respectively. Subsequently, the QRST segment was determined in eachperiod of the ECG signal. Then, two different approaches (time-aligned and zero padding) were applied to remove the QRST segments from each period and make the signalready for AF analysis. To compare the effectiveness of the QRST cancellation approaches, mean spectral power of the residual signal at high frequency bands (upper 12 Hz)was used. The results indicated a superiority of the timealigned averaging method for the application of AF analysis.

Item Type:Conference contribution (Paper)
Keywords:QRS cancellation, ECG, cardiology, frequency analysis, signal averaging, atrial fibrillation, AF cardioversion, zero padding, power density spectrum.
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:26012
Deposited By: Professor Omar Escalona
Deposited On:14 May 2013 13:12
Last Modified:14 May 2013 13:12

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