Key result
A deep neural network classifier using multi-signal ECG spectrograms achieved an overall accuracy of 98.37% in separating specific types of heartbeats.
Why the study?
In ECG signal diagnostics, properly separating supraventricular and ventricular heartbeats is the most significant task, complicated by a limited number of occurrences of rare heartbeats.
A deep neural network classifier using multi-signal ECG spectrograms achieved 98.37% overall accuracy in classifying heartbeats from the MIT-BIH arrhythmia database.
High-accuracy DNN ECG classification on public data shows technical feasibility; leaves open prospective clinical validation and generalizability.
The paper describes a process of formulating a classifier on the basis information contained by MIT-BIH arrhythmia database. This data source contains electrocardiographic signals from two sensors. Both were used, which represent not a typical phenomenon. In the learning process, the classifier uses only information with high certainty. Data are based on expert endorsements and the errors found have been corrected over the years. Specific types of heartbeats were divided into special groups according to the standard "Association for the Advancement of Medical Instrumentation" (AAMI). It recommends splitting the specific types into five separate groups according to physiological origin. Rare heartbeats have a limited number of occurrences. For one group, modifying methods were used which allowed to increase sufficiently the amount of data in training sets. This had a beneficial impact on the results. The solution includes features extraction. The main module of the classifier is a deep neural network. Good result was obtained with tools supporting automatic hyperparameter selection. In ECG signal diagnostics, the most significant task is to properly separate the group of supraventricular and ventricular beats. The study managed to obtain this error at an exceptionally low level and an overall accuracy of 98.37%.
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Siekierski et al. (2022) studied Arrhythmia. Multi-signal ECG spectrogram and convolutional neural network with residual blocks was evaluated on Overall accuracy of heartbeat classification. A deep neural network classifier using multi-signal ECG spectrograms achieved an overall accuracy of 98.37% in separating specific types of heartbeats.
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