Preprocessing MAMD and RSEF for R-R interval detection of ECG

Electrocardiogram (ECG) is used in order to discover heart disease early. Especially, the R-R interval gives useful information about the heart condition. The purpose of this study is the detection of an accurate R wave position in order to extract the R-R interval of the ECG. Recently, a method for detecting the position of an R wave was proposed using moving averaged magnitude difference (MAMD). Since there is an individual difference in the ECG waveform, however, improvement of the approach is necessary. The authors proposed the R/S wave enhancement filter (RSEF) for preprocessing and an R wave detection algorithm which adaptively decides the search region. The algorithm searches for only the short time duration estimated from the most recent R-wave position in order to detect the next R-wave efficiently. The authors call this duration a Window. In this paper, the comparison between the MAMD and the RSEF is also investigated.