Journal
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
Volume 116, Issue 1, Pages 1-9Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.cmpb.2014.04.008
Keywords
QRS detection; S-Transform; Shannon energy
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This paper presents a novel method for QRS detection in electrocardiograms (ECG). It is based on the S-Transform, a new time frequency representation (TFR). The S-Transform provides frequency-dependent resolution while maintaining a direct relationship with the Fourier spectrum. We exploit the advantages of the S-Transform to isolate the QRS complexes in the time-frequency domain. Shannon energy of each obtained local spectrum is then computed in order to localize the R waves in the time domain. Significant performance enhancement is confirmed when the proposed approach is tested with the MIT-BIH arrhythmia database (MITDB). The obtained results show a sensitivity of 99.84%, a positive predictivity of 99.91% and an error rate of 0.25%. Furthermore, to be more convincing, the authors illustrated the detection parameters in the case of certain ECG segments with complicated patterns. (C) 2014 Elsevier Ireland Ltd. All rights reserved.
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