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ECG signal analysis through hidden Markov models

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3 Author(s)
R. V. Andreao ; Departamento de Engenharia E1etrica, Univ. Fed. do Espfrito Santo, Goiabeiras, Brazil ; B. Dorizzi ; J. Boudy

This paper presents an original hidden Markov model (HMM) approach for online beat segmentation and classification of electrocardiograms. The HMM framework has been visited because of its ability of beat detection, segmentation and classification, highly suitable to the electrocardiogram (ECG) problem. Our approach addresses a large panel of topics some of them never studied before in other HMM related works: waveforms modeling, multichannel beat segmentation and classification, and unsupervised adaptation to the patient's ECG. The performance was evaluated on the two-channel QT database in terms of waveform segmentation precision, beat detection and classification. Our waveform segmentation results compare favorably to other systems in the literature. We also obtained high beat detection performance with sensitivity of 99.79% and a positive predictivity of 99.96%, using a test set of 59 recordings. Moreover, premature ventricular contraction beats were detected using an original classification strategy. The results obtained validate our approach for real world application

Published in:

IEEE Transactions on Biomedical Engineering  (Volume:53 ,  Issue: 8 )