title: Fetal magnetocardiogram recordings and Fourier spectral analysis.
abstract: Power spectral analysis of fetal magnetocardiogram (FMCG) data was evaluated in 64 pregnancies, using the non-invasive one channel superconducting quantum interference device (DC-SQUID), in order to investigate the power spectral amplitude distribution in the frequency range between 2 and 3 Hz. In all cases with normal and uncomplicated pregnancies, the data from the fetal heart and specifically the QRS complexes, were identifiable and unaffected by any maternal cardiac activity and furthermore the power spectral amplitudes, which varied between 120 and 350 fT/Hz, were directly related to gestational age.
authors.affiliation: Department of Obstetrics and Gynaecology, Medical School, Demokrition University of Thrace, Alexandroupolis, Greece.
authors.forename: P
authors.initials: P
authors.lastname: Anastasiadis
authors.forename: P A
authors.initials: PA
authors.lastname: Anninos
authors.forename: M V
authors.initials: MV
authors.lastname: Lüdinghausen
authors.forename: A
authors.initials: A
authors.lastname: Kotini
authors.forename: G
authors.initials: G
authors.lastname: Galazios
authors.forename: B
authors.initials: B
authors.lastname: Limberis