A Study on Heart Rate Variability Using Time and Frequency Domain
Keywords:
ECG, Heart rate variability, SVM Classifier, k-means clustering, discrete wavelet transform, fourier transform, feature extraction.Abstract
Heart rate variability (HRV) is a measure of the balance between sympathetic mediators of heart rate that is the effect of epinephrine and norepinephrine released from sympathetic nerve fibres. Heart Rate (HR) is a non-stationary signal. They provides a powerful means of observing the interplay between sympathetic and parasympathetic nervous system. In this paper, we reviewed that Heart Rate Variability becomes an important characteristic to determine the condition of heart. That’s why the calculation of HRV is necessary. ECG is used to detect the heart beat. ECG signal contains lots of noise. To classify the signals first to decompose the signals using wavelet transform. Support Vector Machine is used to classify the denoise signal and for better classification of ECG signal. This paper gives Brief Survey on different technique and Wavelet Transform for better Feature Extraction of ECG signals. Study of HRV enhance our understanding of physiological phenomenon, the actions of medications and disease mechanisms but large scale prospective studies are needed to determine the sensitivity, specificity and predictive values of heart rate variability.
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