Proceedings ArticleDOI
Wavelet analysis of the timing of individual components of the ECG signal
M.J. Burke,M. Nasor +1 more
- Vol. 2, pp 1037-1040
TLDR
A wavelet transform method, based on the Mexican Hat wavelet, was used to precisely locate the positions of the onset, peak and termination of individual components in the ECG signal.Abstract:
ECG recordings were obtained from 21 healthy subjects aged between 13 and 65 years, over a range of heart rate extending from 46 to 184 beats/min (bpm). A wavelet transform method, based on the Mexican Hat wavelet was then used to precisely locate the positions of the onset, peak and termination of individual components in the ECG signal. These times were then classified according to the heart rate associated with the cardiac cycle to which the component belonged. Second order equations in the square root of the cardiac cycle time, T/sub R-R/ of the form A./spl radic/T/sub R-R/+B.T/sub R-R/+C were fitted to the data obtained for each component to characterize its timing variation.read more
Citations
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Journal ArticleDOI
ECG signal analysis through hidden Markov models
TL;DR: This paper presents an original hidden Markov model (HMM) approach for online beat segmentation and classification of electrocardiograms, and the results obtained validate the approach for real world application.
Journal ArticleDOI
Analysis of Myocardial Infarction Using Discrete Wavelet Transform
TL;DR: This work has used multiresolution properties of wavelet transformation because it is suitable tool for interpretation of subtle changes in the ECG signal and is able to detect the normal and MI ECG beat with more than 95% accuracy.
Journal ArticleDOI
The time relationships of the constituent components of the human electrocardiogram
M. J. Burke,Mohamed Nasor +1 more
TL;DR: An examination of the timing relationships of the principal constituent components of the human electrocardiogram (ECG) found that an ECG signal having a profile that varies with heart rate in a manner which reflects the in vivo variation is synthesized.
Desenvolvimento de software para monitoração e análise de pacientes em programas de reabilitação cardíaca
TL;DR: This dissertation presents development of software for monitoring and analysis of patients engaged in rehabilitation programmes in CardIACA and its applications in the field of medicine and health care.
References
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Journal Article
An analysis of the time-relations of electrocardiograms
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Stéphane Mallat,Wen-Liang Hwang +1 more
TL;DR: It is proven that the local maxima of the wavelet transform modulus detect the locations of irregular structures and provide numerical procedures to compute their Lipschitz exponents.
Journal ArticleDOI
Decomposition of Hardy functions into square integrable wavelets of constant shape
A. Grossmann,J. Morlet +1 more
TL;DR: In this article, the authors studied square integrable coefficients of an irreducible representation of the non-unimodular $ax + b$-group and obtained explicit expressions in the case of a particular analyzing family that plays a role analogous to coherent states (Gabor wavelets) in the usual $L_2 $ -theory.
Book
Characterization of Signals From Multiscale Edges
Stéphane Mallat,S. Zhong +1 more
TL;DR: The authors describe an algorithm that reconstructs a close approximation of 1-D and 2-D signals from their multiscale edges and shows that the evolution of wavelet local maxima across scales characterize the local shape of irregular structures.
Journal ArticleDOI
The normal duration of the electrocardiographic ventricular complex.
TL;DR: The duration of ventricular systole has aroused the interest of a number of workers since Garrod pointed out its relation to the heart rate in 1871 and it seems likely that this record of cardiac activity is as closely associated with the state of the myocardium itself, though perhaps not with the general circulation, as the measurement of systoles by mechanical means.