title: Foetal magnetocardiogram amplitude oscillations associated with respiratory sinus arrhythmia.
abstract: We show that oscillations at foetal breathing frequencies observed in foetal heart rate (FHR) tracings obtained from foetal magnetocardiogram (FMCG) recordings are often accompanied by synchronous modulation of FMCG signal amplitude. This implies an association between the FHR oscillations and foetal chest wall movements, corroborating the hypothesis that the oscillations are due to respiratory sinus arrhythmia.
authors.affiliation: Department of Medical Physics, University of Wisconsin-Madison, USA.
authors.forename: R T
authors.initials: RT
authors.lastname: Wakai
authors.forename: M
authors.initials: M
authors.lastname: Wang
authors.forename: A C
authors.initials: AC
authors.lastname: Leuthold
authors.forename: C B
authors.initials: CB
authors.lastname: Martin
mesh_terms: D000328:Adult; D001146:Arrhythmia, Sinus / Q000503:physiopathology*; D004562:Electrocardiography / Q000295:instrumentation*; D005260:Female; D005323:Fetal Monitoring; D006340:Heart Rate, Fetal / Q000502:physiology*; D006801:Humans; D008280:Magnetics; D011247:Pregnancy; D012119:Respiration / Q000502:physiology*