Table of Contents
Journal of Medical Engineering
Volume 2015, Article ID 438569, 9 pages
http://dx.doi.org/10.1155/2015/438569
Research Article

Identification of Premature Ventricular Cycles of Electrocardiogram Using Discrete Cosine Transform-Teager Energy Operator Model

1Department of ECE, Kamala Institute of Technology & Science, Huzurabad, Telangana 505468, India
2Department of ECE, Kakatiya Institute of Technology & Science, Warangal, Telangana 506015, India

Received 31 August 2014; Revised 15 December 2014; Accepted 3 January 2015

Academic Editor: Hasan Al-Nashash

Copyright © 2015 Vallem Sharmila and K. Ashoka Reddy. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An algorithm based on the ability of TEO to track the changes in the envelope of ECG signal is proposed for identifying PVCs in ECG. Teager energy is calculated from DCT coefficients of ECG signal. This method can be considered as computationally efficient algorithm when compared with the well-known DCT cepstrum technique. EPE is derived from the teager energy of DCT coefficients in DCT-TEO method and from the cepstrum of DCT coefficients in the existing method. EPE determines the decay rate of the action potential of ECG beat and provides sufficient information to identify the PVC beats in ECG data. EPEs obtained by DCT-TEO and existing DCT cepstrum models are compared. The proposed algorithm has resulted in performance measures like sensitivity of 98–100%, positive predictivity of 100%, and detection error rate of 0.03%, when tested on MIT-BIH database signals consisting of PVC and normal beats. Result analysis reveals that the DCT-TEO algorithm worked well in clear identification of PVCs from normal beats compared to the existing algorithm, even in the presence of artifacts like baseline wander, PLI, and noise with SNR of up to −5 dB.