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Impact of ECG dataset diversity on generalization of CNN model for detecting QRS complex

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Version 2 2024-05-30, 11:27
Version 1 2019-08-14, 11:01
journal contribution
posted on 2024-05-30, 11:27 authored by Ahsan Habib, Chandan KarmakarChandan Karmakar, John YearwoodJohn Yearwood
Detection of QRS complexes in electrocardiogram (ECG) signal is crucial for automated cardiac diagnosis. Automated QRS detection has been a research topic for over three decades and several of the traditional QRS detection methods show acceptable detection accuracy, however, the applicability of these methods beyond their study-specific databases was not explored. The non-stationary nature of ECG and signal variance of intra and inter-patient recordings impose significant challenges on single QRS detectors to achieve reasonable performance. In real life, a promising QRS detector may be expected to achieve acceptable accuracy over diverse ECG recordings and, thus, investigation of the model's generalization capability is crucial. This paper investigates the generalization capability of convolutional neural network (CNN) based-models from intra (subject wise leave-one-out and five-fold cross validation) and inter-database (training with single and multiple databases) points-of-view over three publicly available ECG databases, namely MIT-BIH Arrhythmia, INCART, and QT. Leave-one-out test accuracy reports 99.22%, 97.13%, and 96.25% for these databases accordingly and inter-database tests report more than 90% accuracy with the single exception of INCART. The performance variation reveals the fact that a CNN model's generalization capability does not increase simply by adding more training samples, rather the inclusion of samples from a diverse range of subjects is necessary for reasonable QRS detection accuracy.

History

Journal

IEEE access

Volume

7

Pagination

93275-93285

Location

Piscataway, N.J.

ISSN

2169-3536

eISSN

2169-3536

Language

English

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2019, IEEE

Publisher

Institute of Electrical and Electronics Engineers