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Abnormal beat detection from unreconstructed compressed signals based on linear approximation in ECG signals suitable for embedded IoT devices

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Abstract

In the study of electrocardiogram signal monitoring systems, signal compression techniques for effective signal transmission and abnormal beat detection for arrhythmia diagnosis are paramount areas. The general abnormal beat detection has a problem of unsuitability for low-power and low-capacity embedded devices because it requires reconstructing a compressed signal to generate an auxiliary signal for fiducial point (FP) detection. In this study, we propose a method to compress signals into a small number of vertices, including the FP, using an optimized dynamic programming-based linear approximation. Then, we detect the FP from the vertices and classify the abnormal beat. The proposed method minimizes the amount of memory usage and computation by detecting the FP using the vertex’s feature value without reconstructing the compressed signal. The signal compression performance of the proposed method showed an average compression ratio of 7.05:1 and a root-mean-square difference of 0.78% for 48 records of the MIT-BIH arrhythmia database. In addition, the premature ventricular contraction abnormal beat detection performance using only QR interval feature showed 84.07% sensitivity and 93.70% accuracy; when R-peak’s amplitude and RR interval features were added, the sensitivity and accuracy increased to 96.65% and 93.76%, respectively. Therefore, we confirmed that the proposed method could effectively compress electrocardiogram signals based on linear approximation and detect abnormal beats without signal reconstruction.

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Acknowledgements

This work was supported in part by the Institute of Information and Communications Technology Planning and Evaluation (IITP) grant funded by the Korea Government (MSIT), Metamorphic Approach of Unstructured Validation/Verification for Analyzing Binary Code, under Grant 2021-0-00944, 60%, in part by the Ministry of Education through the BK21 FOUR Project under Grant 4199990113966, 10%, in part by the National Research Foundation of Korea (NRF) funded by the Ministry of Education through the Basic Science Research Program under Grant NRF-2020R1I1A1A01072343, 20%, and Grant NRF-2018R1A6A1A03025109, 10%.

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Correspondence to Daejin Park.

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Lee, S., Park, D. Abnormal beat detection from unreconstructed compressed signals based on linear approximation in ECG signals suitable for embedded IoT devices. J Ambient Intell Human Comput 13, 4705–4717 (2022). https://doi.org/10.1007/s12652-021-03578-y

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  • DOI: https://doi.org/10.1007/s12652-021-03578-y

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