Multichannel mapping of fetal magnetocardiogram in an unshielded hospital setting

Objectives To evaluate the feasibility of unshielded in‐hospital multichannel mapping of fetal magnetocardiogram (FMCG), with a 36‐channel system for standard adult magnetocardiographic (MCG) recordings, and its reliability according to the recommended standards for FMCG. Methods FMCG was ambulatory...

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Veröffentlicht in:Prenatal diagnosis Jg. 25; H. 5; S. 376 - 382
Hauptverfasser: Brisinda, Donatella, Comani, Silvia, Meloni, Anna Maria, Alleva, Giovanna, Mantini, Dante, Fenici, Riccardo
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Chichester, UK John Wiley & Sons, Ltd 01.05.2005
Wiley
Schlagworte:
Adult
Ambulatory Care
Arrhythmias, Cardiac - diagnosis
Arrhythmias, Cardiac - embryology
Arrhythmias, Cardiac - physiopathology
Biological and medical sciences
Birth control
Cardiac dysrhythmias
Cardiology. Vascular system
Electrocardiography - methods
Female
fetal arrhythmias
fetal heart rate variability
fetal magnetocardiography' independent component analysis
Fetal Monitoring - methods
Gestational Age
Gynecology. Andrology. Obstetrics
Heart
Heart Rate, Fetal
Hormonal contraception
Humans
Medical sciences
Pilot Projects
Predictive Value of Tests
Pregnancy
Pregnancy Trimester, Third
Prenatal Diagnosis
unshielded magnetocardiography
Cartography
Arrhythmia
Variability
Cardiovascular disease
Pregnancy
Prenatal
Heart rate
unshielded magnetocardiography
Heart disease
fetal arrhythmias
Fetus
Magnetocardiography
fetal magnetocardiography' independent component analysis
Diagnosis
Hospital
Public health
fetal heart rate variability
ISSN:0197-3851, 1097-0223
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Zusammenfassung:Objectives To evaluate the feasibility of unshielded in‐hospital multichannel mapping of fetal magnetocardiogram (FMCG), with a 36‐channel system for standard adult magnetocardiographic (MCG) recordings, and its reliability according to the recommended standards for FMCG. Methods FMCG was ambulatory mapped with a 36‐channel MCG system, in six normal pregnancies at different gestational ages. MCG analysis included adaptive digital filtering of 50 Hz, signal averaging, reconstruction of magnetic field distribution (MFD) and source localization. Fixed Point Independent Component Analysis algorithm (FastICA) was used to reconstruct the FMCG, separating them from maternal contamination and noise. Results The quality of FMCG recorded after the 32nd gestational week and reconstructed with FastICA was close to FMCG obtained in shielded rooms, and good enough to measure cardiac intervals and heart rate variability parameters. In two cases, reconstruction of the MFD during the QRS allowed three‐dimensional localization of ventricular sources. Conclusions A first demonstration has been given that multichannel mapping of FMCG can be performed in unshielded clinical environments, with resolution good enough for contactless assessment of fetal cardiac electrophysiology. FastICA processing on unshielded FMCG, recorded after the 32nd week, provided beat‐to‐beat analysis and heart rate variability assessment. Further work is needed to improve signal reconstruction in early pregnancy. Copyright © 2005 John Wiley & Sons, Ltd.
Bibliographie:istex:1F3AED292F44725B92C50B551D4E2FA20AB5334F
ark:/67375/WNG-3ZL4BM5V-V
ArticleID:PD1160
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Undefined-1
ObjectType-Feature-3
content type line 23
ISSN:0197-3851
1097-0223
DOI:10.1002/pd.1160