901–37 Computer Implementation of Wavelet Decomposition of Signal Averaged Electrocardiograms
نویسندگان
چکیده
منابع مشابه
Analysis of Noise Level Effects on Signal-Averaged Electrocardiograms
Noise level has critical effects on the diagnostic performance of signal-averaged electrocardiogram (SAECG), because the true starting and end points of QRS complex would be masked by the residual noise and sensitive to the noise level. Several studies and commercial machines have used a fixed number of heart beats (typically between 200 to 600 beats) or set a predefined noise level (typically ...
متن کاملImproved Time-Frequency Filtering of Signal-Averaged Electrocardiograms
A recently proposed time-frequency ltering technique has shown promising results for the enhancement of signal-averaged electrocardiograms. This method weights the short-time Fourier transform (STFT) of the ensemble-averaged signal, analogous to the spectral domain Wiener ltering of stationary signals. In eeect, it is a self-designing time-varying Wiener lter applied to the high resolution elec...
متن کاملPredictive value of wavelet decomposition of the signal-averaged electrocardiogram in idiopathic dilated cardiomyopathy.
BACKGROUND Wavelet decomposition of the signal-averaged electrocardiogram has been proposed as a method of detecting small and transient irregularities hidden within the QRS complex and of overcoming some of the limitations of time domain analysis of the signal-averaged electrocardiogram. AIM This study evaluated the potential utility of wavelet decomposition analysis in the risk stratificati...
متن کاملComparative Analysis of Wavelet-based Feature Extraction for Intramuscular EMG Signal Decomposition
Background: Electromyographic (EMG) signal decomposition is the process by which an EMG signal is decomposed into its constituent motor unit potential trains (MUPTs). A major step in EMG decomposition is feature extraction in which each detected motor unit potential (MUP) is represented by a feature vector. As with any other pattern recognition system, feature extraction has a significant impac...
متن کاملFundamentals of Time- and Frequency-Domain Analysis of Signal-Averaged Electrocardiograms
The mathematical framework established for the computer-aided analysis of linear systems has been used both to generate and to study signal-averaged ECGs. In this context a system is a mathematical model for any physical operation or transformation that takes an input and produces an output. A system is linear if the output due to two inputs delivered simultaneously is the sum of the outputs du...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 1995
ISSN: 0735-1097
DOI: 10.1016/0735-1097(95)91514-x