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Position difference regularity of corresponding R-wave peaks for maternal ECG components from different abdominal points
Authors:Zhang Jie-Min  Guan Qun  Tang Li-Ming  Liu Tie-Bing  Liu Hong-Xing  Huang Xiao-Lin  Si Jun-Feng
Affiliation:a School of Electronic Science and Engineering, Nanjing University, Xianlin Campus, Nanjing 210046, China;b Nanjing General Hospital of Nanjing Military command, Nanjing 210023, China
Abstract:We collected 343 groups of abdominal electrocardiogram (ECG) data from 78 pregnant women and deleted the channels unable for experts to determine R-wave peaks from them; then, based on these filtered data, the statistics of position difference of corresponding R-wave peaks for different maternal ECG components from different points were studied. The resultant statistics showed the regularity that the position difference of corresponding maternal R-wave peaks between different abdominal points does not exceed the range of 30 ms. The regularity was also proved using the fECG data from MIT–BIH PhysioBank. Additionally, the paper applied the obtained regularity, the range of position differences of the corresponding maternal R-wave peaks, to accomplish the automatic detection of maternal R-wave peaks in the recorded all initial 343 groups of abdominal signals, including the ones with the largest fetal ECG components, and all 55 groups of ECG data from MIT–BIH PhysioBank, achieving the successful separation of the maternal ECGs.
Keywords:fetal electrocardiogram  abdominal ECG  R-wave detection
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