ECG arrhythmia classification based on logistic model tree

Venkatachalam Mahesh, Arumugam Kandaswamy, Chandran Vimal, Balakrishnan Sathish

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DOI: 10.4236/jbise.2009.26058                

Abstract

This paper presents a diagnostic system for classification of cardiac arrhythmia from ECG data, using Logistic Model Tree (LMT) classifier. Clinically useful information in the ECG is found in the intervals and amplitudes of the characteristic waves. Any abnormality in the wave shape and duration of the wave features of the ECG is considered as arrhythmia. The ampli-tude and duration of the characteristic waves of the ECG can be more accurately obtained using Discrete Wavelet Transform (DWT) analysis. Further, the non-linear behavior of the cardiac system is well characterized by Heart Rate Variability (HRV). Hence, DWT and HRV techniques have been employed to extract a set of linear (time and frequency domain) and non-linear characteristic features from the ECG signals. These features are used as input to the LMT classifier to classify 11 different arrhyth-mias. The results obtained indicate an impressive prediction accuracy of 98%, validating the choice and combined use of the current popular techniques (DWT and HRV) for cardiac arrhythmia classification. The system can be de-ployed for practical use after validation by experts.

Keywords

ECG; Arrhythmia; Wavelet Transform; HRV Analysis; Feature Extraction

Conflicts of Interest

The authors declare no conflicts of interest.

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