Comparative Analysis of Electrocardiogram Signals Using Several Discrete Transforms Based on Deep Learning

Azmy, Mohamed Moustafa

doi:10.21608/eijest.2021.86915.1082

Comparative Analysis of Electrocardiogram Signals Using Several Discrete Transforms Based on Deep Learning

Document Type : Original Article

Author

Mohamed Moustafa Azmy

Alexandria university

10.21608/eijest.2021.86915.1082

Abstract

Physicians use ECG to evaluate the electrical activity of patients’ hearts to know whether their hearts working effectively or not. In this paper, ECG is classified into normal andAtrial Fibrillation AF patients using new methods of extracting features from ECG signals. Extracted features from ECG signals are conducted as follows: in the first step ECG signals are normalized and detrended. Then, 24 algorithms are examined. The best performance algorithm is obtained using short time Fourier transform STFT. After that, power is calculated by squaring the signal. Then discrete cosine transform DCT is considered. First and second derivative are computed for the DCT signal. Finally statistical calculations are applied for DCT signal, 1st derivative and 2nd derivative. Many classifiers are compared as Artificial Neural Network, KNN, Support Vector Machine SVM, ANFIS, Deep Learning DL with bi-long short term memory BILSTM and long short term memory LSTM. The maximum obtained accuracy is achieved by using DL with BILSTM layer after extracting features from ECG signals using the best algorithm. The obtained training and testing accuracies are 99.5% and 99.1% respectively. Receiver operating characteristics (ROC) of the selected algorithm are approaching to 1. So, the novelty of this research is obtained by applying this algorithm for extracting ECG signals.

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