Key result
An SVM-RBF classifier using ABC-PSO on PPG signals achieves ~95% accuracy for detecting cardiovascular disease.
Why the study?
PPG signals are increasingly used for non-invasive CVD detection, and analyzing them can identify irregular heart patterns and other indicators of disease.
Do heuristic optimization algorithms and machine learning classifiers accurately detect cardiovascular disease from PPG signals?
Do heuristic optimization algorithms and machine learning classifiers accurately detect cardiovascular disease from PPG signals?
Heuristic-based optimization combined with the SVM-RBF classifier on PPG signals provides highly accurate non-invasive detection of cardiovascular disease.
Needs prospective validation before clinical use; leaves open the utility of optimized ML classifiers for PPG-based CVD detection.
BACKGROUND/OBJECTIVES: Photoplethysmography (PPG) signals, which measure blood volume changes through light absorption, are increasingly used for non-invasive cardiovascular disease (CVD) detection. Analyzing PPG signals can help identify irregular heart patterns and other indicators of CVD. METHODS: This research involves a total of 41 subjects sourced from the CapnoBase database, consisting of 21 normal subjects and 20 CVD cases. In the initial stage, heuristic optimization algorithms, such as ABC-PSO, the Cuckoo Search algorithm (CSA), and the Dragonfly algorithm (DFA), were applied to reduce the dimension of the PPG data. Next, these Dimensionally Reduced (DR) PPG data are then fed into various classifiers such as Linear Regression (LR), Linear Regression with Bayesian Linear Discriminant Classifier (LR-BLDC), K-Nearest Neighbors (KNN), PCA-Firefly, Linear Discriminant Analysis (LDA), Kernel LDA (KLDA), Probabilistic LDA (ProbLDA), SVM-Linear, SVM-Polynomial, and SVM-RBF, to identify CVD. Classifier performance is evaluated using Accuracy, Kappa, MCC, F1 Score, Good Detection Rate (GDR), Error rate, and Jaccard Index (JI). RESULTS: The SVM-RBF classifier for ABC PSO dimensionality reduced values outperforms other classifiers, achieving the highest accuracy of 95.12% along with the minimum error rate of 4.88%. In addition to that, it provides an MCC and kappa value of 0.90, a GDR and F1 score of 95%, and a Jaccard Index of 90.48%. CONCLUSIONS: This study demonstrated that heuristic-based optimization and machine learning classification of PPG signals are highly effective for the non-invasive detection of cardiovascular disease.
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Palanisamy et al. (2024) studied Cardiovascular disease (n=41). SVM-RBF classifier with ABC-PSO dimensionality reduction of PPG signals vs. Other machine learning classifiers was evaluated on Accuracy of cardiovascular disease detection. The SVM-RBF classifier using ABC-PSO dimensionality reduction of PPG signals achieved 95.12% accuracy and a 4.88% error rate for detecting cardiovascular disease compared to other classifiers.
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