Time-domain morphology and gradient based algorithm for ECG feature extraction


Mazomenos, Evangelos, Chen, Taihai, Acharyya, Amit, Bhattacharya, Arnab, Rosengarten, James and Maharatna, Koushik (2012) Time-domain morphology and gradient based algorithm for ECG feature extraction. In, Proceedings of 2012 IEEE International Conference on Industrial Technology (ICIT). IEEE International Conference on Industrial Technology Piscataway, United States, Institute of Electrical and Electronics Engineers, 117-122. (doi:10.1109/ICIT.2012.6209924).

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Description/Abstract

A Time Domain Morphology and Gradient (TDMG) based algorithm is presented in this paper for the extraction of all the fiducial time instances from a single PQRST complex. By estimating these characteristic points, all clinically important temporal ECG parameters can be calculated. The proposed algorithm is based on a combination of extrema detection and slope information, with the use of adaptive thresholding to achieve the extraction of 11 time instances. A pre-processing step removes any noise and artefacts from the captured ECG signal. Initially, the position of the R-wave and the QRS-complex boundaries are localized in time. Following, by focusing on the part of the signal that precedes and succeeds the QRS-complex, the remaining fiducial points from the P and T waves are estimated. The initial localisation of the wave boundaries is complimented by amendment steps which are introduced to cater for atypical wave morphologies, indicative of particular heart conditions. The proposed algorithm is evaluated on the QT and PTB databases against medically annotated ECG samples. The results demonstrate the ability of the proposed scheme, to estimate the ECG fiducial points with acceptable accuracy from a single-lead ECG signal. In addition, this investigation reveals the ability of the TDMG algorithm to perform accurately irrespective of the lead chosen, the different disease categories and the sampling frequency of the captured ECG signal.

Item Type: Book Section
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
R Medicine > RT Nursing
Divisions: Faculty of Health Sciences
Faculty of Physical Sciences and Engineering > Electronics and Computer Science > Electronic & Software Systems
ePrint ID: 340407
Date Deposited: 21 Jun 2012 11:02
Last Modified: 27 Mar 2014 20:22
Publisher: Institute of Electrical and Electronics Engineers
Further Information:Google Scholar
ISI Citation Count:0
URI: http://eprints.soton.ac.uk/id/eprint/340407

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