4.6 Article

OptRPC: A novel and optimized recurrence plot-based system for ECG beat classification

Journal

BIOMEDICAL SIGNAL PROCESSING AND CONTROL
Volume 72, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.bspc.2021.103328

Keywords

ECG beat classification; Recurrence plot; Deep learning; Biomedical signal

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Cardiac arrhythmia refers to irregularities in heartbeats that can cause severe complications if left undiagnosed. Traditional deep learning methods for automated diagnosis often have demographic biases, leading researchers to propose a dynamical systems-based classifier method which achieved high accuracy levels on two benchmark databases.
Cardiac arrhythmia refers to irregularities in heartbeats. Left undiagnosed arrhythmias can cause severe and potentially fatal complications. As a result, early finding of such abnormalities is critical. Electrocardiogram (ECG) is regularly used by medical professionals to diagnose and differentiate cardiac arrhythmias. As a result, there have been many deep learning methods over the years in an attempt to automate this process. But traditional deep learning methods require big training data which often clearly do not reflect the age, weight and gender spectrum of patients and are prone to misclassification when data from different demographics is shown. Hence, temporal features extracted from these datasets are demographically biased. Consequently, in this paper, we intend to introduce Optimum Recurrence Plot based Classifier (OptRPC); a dynamical systems-based method of classifying ECG beats by embedding them in higher dimensions and devising an optimized recurrence plot. A Convolutional Neural Network architecture is then used to classify these recurrence plots. The proposed scheme accomplished an overall accuracy of 98.67% and 98.48% on two benchmark databases and delivered better performance than the previous state-of-the-art methods.

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