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Myocardial infarction detection using ITD, DWT and deterministic learning based on ECG signals

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Abstract

Nowadays, cardiovascular diseases (CVD) is one of the prime causes of human mortality, which has received tremendous and elaborative research interests regarding the prevention issue. Myocardial ischemia is a kind of CVD which will lead to myocardial infarction (MI). The diagnostic criterion of MI is supplemented with clinical judgement and several electrocardiographic (ECG) or vectorcardiographic (VCG) programs. However the visual inspection of ECG or VCG signals by cardiologists is tedious, laborious and subjective. To overcome such disadvantages, numerous MI detection techniques including signal processing and artificial intelligence tools have been developed. In this study, we propose a novel technique for automatic detection of MI based on disparity of cardiac system dynamics and synthesis of the standard 12-lead and Frank XYZ leads. First, 12-lead ECG signals are synthesized with Frank XYZ leads to build a hybrid 4-dimensional cardiac vector, which is decomposed into a series of proper rotation components (PRCs) by using the intrinsic time-scale decomposition (ITD) method. The novel cardiac vector may fully reflect the pathological alterations provoked by MI and may be correlated to the disparity of cardiac system dynamics between healthy and MI subjects. ITD is employed to measure the variability of cardiac vector and the first PRCs are extracted as predominant PRCs which contain most of the cardiac vector’s energy. Second, four levels discrete wavelet transform with third-order Daubechies (db3) wavelet function is employed to decompose the predominant PRCs into different frequency bands, which combines with three-dimensional phase space reconstruction to derive features. The properties associated with the cardiac system dynamics are preserved. Since the frequency components above 40 Hz are lack of use in ECG analysis, in order to reduce the feature dimension, the advisable sub-band (D4) is selected for feature acquisition. Third, neural networks are then used to model, identify and classify cardiac system dynamics between normal (healthy) and MI cardiac vector signals. The difference of cardiac system dynamics between healthy control and MI cardiac vector is computed and used for the detection of MI based on a bank of estimators. Finally, experiments are carried out on the PhysioNet PTB database to assess the effectiveness of the proposed method, in which conventional 12-lead and Frank XYZ leads ECG signal fragments from 148 patients with MI and 52 healthy controls were extracted. By using the tenfold cross-validation style, the achieved average classification accuracy is reported to be 98.20%. Results verify the effectiveness of the proposed method which can serve as a potential candidate for the automatic detection of MI in the clinical application.

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Data availibility statement

The datasets used and/or analyzed during in current study are available from the public Physionet PTB dataset (Bousseljot et al. 1995; Goldberger et al. 2000) which can be accessed at the website: https://www.physionet.org/content/ptbdb/1.0.0/.

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Acknowledgements

This work was funded by the Natural Science Foundation of Fujian Province (Grant no. 2022J011146).

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  1. School of Physics and Mechanical and Electrical Engineering, Longyan University, Longyan, 364012, People’s Republic of China

    Wei Zeng

  2. Department of Mechanical, Industrial and Systems Engineering, University of Rhode Island, Kingston, RI, 02881, USA

    Chengzhi Yuan

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Appendix

Appendix

See Figs. 7 and 8.

Fig. 7
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Samples of the ITD of the subvectors \(V_2, V_3\) and \(V_4\) from HC and MI subject

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Fig. 8
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Samples of four levels DWT of \(\mathrm {PRC_1}\) of the subvector \(V_2, V_3\) and \(V_4\) from HC and MI subjects

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Zeng, W., Yuan, C. Myocardial infarction detection using ITD, DWT and deterministic learning based on ECG signals. Cogn Neurodyn 17, 941–964 (2023). https://doi.org/10.1007/s11571-022-09870-7

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