Some regularity on how to locate electrodes for higher fECG SNRs

doi:10.1088/1674-1056/24/3/038702

Abstract The electrocardiogram (ECG) recorded from the abdominal surface of a pregnant woman is a composite of maternal ECG, fetal ECG (fECG) and other noises, while only the fECG component is always needed by us. With different locations of electrode pairs on the maternal abdominal surface to measure fECGs, the signal-to-noise ratios (SNRs) of the recorded abdominal ECGs are also correspondingly different. Some regularity on how to locate electrodes to obtain higher fECG SNRs is needed practically. In this paper, 343 groups of abdominal ECG records were acquired from 78 pregnant women with different electrode pairs locating, and an appropriate extended research database is formed. Then the regularity on fECG SNRs corresponding to different electrode pairs locating was studied. Based on statistical analysis, it is shown that the fECG SNRs are significantly higher in certain locations than others. Reasonable explanation is also provided to the statistical result using the theories of the fetal cardiac electrical axis and the signal phase delay.

Keywords: abdominal ECG fetal ECG SNR statistical regularity

Received: 21 February 2014
Revised: 13 October 2014
Accepted manuscript online:

PACS:	87.85.Ng	(Biological signal processing)
	87.57.N-	(Image analysis)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61271079) and the Supporting Plan Project of Jiangsu Province, China (Grant No. BE2010720).

Corresponding Authors: Liu Tie-Bing, Liu Hong-Xing
E-mail: njbull@163.com;njhxliu@nju.edu.cn

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Zhang Jie-Min (张洁敏), Huang Xiao-Lin (黄晓林), Guan Qun (管群), Liu Tie-Bing (刘铁兵), Li Ping (李萍), Zhao Ying (肇莹), Liu Hong-Xing (刘红星) Some regularity on how to locate electrodes for higher fECG SNRs 2015 Chin. Phys. B 24 038702

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