Title [R-wave detection of ECG signal by using wavelet transform].
Author Tian, Xuelong; Yan, Chunhong; Yu, Yaqing; Wang, Tianxing
Journal Sheng Wu Yi Xue Gong Cheng Xue Za Zhi Publication Year/Month 2006-Apr
PMID 16706342 PMCID -N/A-
Affiliation 1.College of Bioengineering and Key Lab for Biomechanics & Tissue Engineering under the State Ministry of Education, Chongqing University, Chongqing 400044, China.

The detection of R-wave of ECG is essential to the analysis of the heart rate variability (HRV). In this paper, an R-wave detection method using wavelet transform(WT) is presented in line with the principle of discrete wavelet transform(DWT) and multi-resolution technique (MRT). We made use of the special properties of dbl wavelet in time-domain, decomposed the original ECG signals into 3-level detailed signals on different frequency bands by using DWT with Mallat algorithm, and got appropriate threshold values in different high frequency bands to distinguish R-wave. It is concluded that the algorithm had significant effects on it, which is verified by MIT/BIH (Massachusetts Institute of Technology/Boston\'s Beth Israel Hospital) ECG Database. The results show that R-wave could be detected accurately and localized precisely by this method, even when the patient was seriously sick or the signal was disturbed by noise. Consequently the method has a quite high locating precision (its error is not more than two sampled points and about 85 percent of the points of R-wave in ECG signal are localized precisely) and the correct detection rate of R-wave is 99.8% by using wavelet transform, so this method is quite feasible.

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