Recent Advances in Fetal Electrocardiography
Yoshitaka Kimura1, 3, *, Naoaki Sato2, Junichi Sugawara3, Clarissa Velayo3, Teturo Hoshiai3, Satoru Nagase3, Takuya Ito4, Yukari Onuma1, Asami Katsumata1, Kunihiro Okamura3, 5, Nobuo Yaegashi3
Identifiers and Pagination:Year: 2012
First Page: 7
Last Page: 12
Publisher Id: TOMDJ-4-7
Article History:Received Date: 4/1/2012
Revision Received Date: 28/03/2012
Acceptance Date: 30/03/2012
Electronic publication date: 31/5/2012
Collection year: 2012
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Since the first observations of Cremer in 1906, fetal electrocardiogram (ECG) measurements via the maternal abdominal wall have remained a formidable challenge for clinical technicians and engineers in the cutting-edge field of information theory. Previous obstacles in extracting fetal ECG still complicate their acquisition at the present. These include three main difficulties for non-invasive measurement of fetal ECG: first, the low signal to noise ratio; second, the lack of a standard lead system for fetal ECG on the maternal abdomen; and third, the factor of fetal movement or non-stationarity during recording. A new extraction system based on blind source separation with reference signals (BSSR) was utilized and our detection rates, both off-line (91%) and on-line (60%), in pregnancies of 20 to 41 weeks of gestation have shown a marked improvement from earlier attempts. With this development, we discuss the potentials and limitations of this new system.