Identification of Heart Sounds for the Analysis of Cardiac Pathology Using Machine Learning

Abstract

Cardiovascular diseases (CVDs), including chronic heart failure (CHF), represent a major global health challenge. Early detection is essential but often limited by data scarcity. This paper explores two key contributions to address this issue: detection of CHF decompensation using phonocardiogram (PCG) recordings and machine learning, and PCGmix, a novel data-augmentation technique tailored to heart sounds. In a study with 37 CHF patients, our models classified decompensated vs. recompensated states with up to 72\% accuracy. PCGmix further improves diagnostic performance in scenarios with limited training data, achieving comparable accuracy to models trained on datasets up to 50\% larger without augmentation.

References

Martin, S. S., Aday, A. W., Almarzooq, Z. I., Anderson, et al. (2024) 2024 Heart Disease and stroke statistics: A report of US and global data from the American Heart Association, Circulation, 149(8), e347–e913. doi: 10.1161/CIR.0000000000001209.

McDonagh, T. A., Metra, M., Adamo, M., et al. (2021) 2021 ESC Guidelines for the diagnosis and treatment of acute and chronic heart failure, European Heart Journal, 42(36), 3599–3726. doi: 10.1093/eurheartj/ehab368.

Susič, D., Poglajen, G., and Gradišek, A. (2022) Identification of decompensation episodes in chronic heart failure patients based solely on heart sounds, Frontiers in Cardiovascular Medicine, 9, 1009821. doi: 10.3389/fcvm.2022.1009821.

Liu, C., Springer, D., Li, Q., et al. (2016) An open access database for the evaluation of heart sound algorithms, Physiological Measurement, 37(12),

–2213. doi: 10.1088/0967-3334/37/12/2181.

Susič, D., Gradišek, A., and Gams, M. (2024). PCGmix: A data-augmentation method for heart-sound classification, IEEE Journal of Biomedical and Health Informatics, 28(11), 6874–6885. doi:10.1109/JBHI.2024.3458430

Susič, D.(2024). Identification of heart sounds for the analysis of cardiac pathology using machine learning [Doctoral dissertation, Jožef Stefan Interational Postgraduate School

Authors

  • David Susič Jožef Stefan Institute , Jožef Stefan Institute

DOI:

https://doi.org/10.31449/inf.v50i2.8753

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Published

08/04/2026

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Thesis summary

How to Cite

Susič, D. (2026). Identification of Heart Sounds for the Analysis of Cardiac Pathology Using Machine Learning. Informatica, 50(2). https://doi.org/10.31449/inf.v50i2.8753