Key result
A novel algorithm based on multi-scale wavelet α-entropy and a support vector machine classifier achieved a correct rate of 92.18%, sensitivity of 94.88%, and specificity of 89.48% for predicting paroxysmal atrial fibrillation episodes.
A novel algorithm using multi-scale wavelet α-entropy of heart rate variability combined with an SVM classifier accurately identifies paroxysmal atrial fibrillation, outperforming traditional analysis methods.
BACKGROUND: This study proposed an effective method based on the wavelet multi-scale α-entropy features of heart rate variability (HRV) for the recognition of paroxysmal atrial fibrillation (PAF). This new algorithm combines wavelet decomposition and non-linear analysis methods. The PAF signal, the signal distant from PAF, and the normal sinus signals can be identified and distinguished by extracting the characteristic parameters from HRV signals and analyzing their quantification indexes. The original ECG signals for QRS detection and HRV signal extraction are first processed. The features from the HRV signals are extracted as feature vectors using the wavelet multi-scale entropy. A support vector machine-based classifier is used for PAF prediction. RESULTS: The performance of the proposed method in predicting PAF episodes is evaluated with 100 signals from the MIT-BIT PAF prediction database. With regard to the dynamics and uncertainty of PAF signals, our proposed method obtains the values of 92.18, 94.88, and 89.48% for the evaluation criteria of correct rate, sensitivity, and specificity, respectively. CONCLUSIONS: Our proposed method presents better results than the existing studies based on time domain, frequency domain, and non-linear methods. Thus, our method shows considerable potential for clinical monitoring and treatment.
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Xin et al. (2017) studied Paroxysmal atrial fibrillation (n=100). Multi-scale wavelet α-entropy and SVM classifier vs. Time-domain, frequency-domain, sample-entropy, and wavelet-energy features was evaluated on Correct rate of PAF prediction. A novel algorithm based on multi-scale wavelet α-entropy and a support vector machine classifier achieved a correct rate of 92.18%, sensitivity of 94.88%, and specificity of 89.48% for predicting paroxysmal atrial fibrillation episodes.
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