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Titolo:
Fetal cardiac activity analysis during twin pregnancy using a multi-channel SQUID system
Autore:
Monteiro, EC; Schleussner, E; Kausch, S; Grimm, B; Schneider, A; Barbosa, CH; Haueisen, J;
Indirizzi:
Pontificia Univ Catolica Rio de Janeiro, Dept Phys, BR-22453900 Rio De Janeiro, Brazil Pontificia Univ Catolica Rio de Janeiro Rio De Janeiro Brazil BR-22453900 BC Univ Jena, Biomagnet Ctr Jena, D-07743 Jena, Germany Univ Jena Jena Germany D-07743 Biomagnet Ctr Jena, D-07743 Jena, Germany
Titolo Testata:
PHYSICA C
fascicolo: 1-4, volume: 354, anno: 2001,
pagine: 87 - 90
SICI:
0921-4534(200105)354:1-4<87:FCAADT>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETOCARDIOGRAPHY;
Keywords:
SQUID magnetometer; biomagnetism; fetal magnetocardiography; twins;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
9
Recensione:
Indirizzi per estratti:
Indirizzo: Barbosa, CH Pontificia Univ Catolica Rio de Janeiro, Dept Phys, Rua Marques Sao Vicente 225, BR-22453900 Rio De Janeiro, Brazil Pontificia Univ Catolica Rio de Janeiro Rua Marques Sao Vicente 225 Rio De Janeiro Brazil BR-22453900 BC
Citazione:
E.C. Monteiro et al., "Fetal cardiac activity analysis during twin pregnancy using a multi-channel SQUID system", PHYSICA C, 354(1-4), 2001, pp. 87-90

Abstract

The use of SQUID magnetometers for non-invasive in utero assessment of cardiac electrical disturbances has already been shown to be a valuable clinical tool. In this way, its applicability also for the complicated case of twin pregnancy, in which the proximity of the cardiac magnetic source of eachfetus can hamper the individual analysis of cardiac electrical activity, is of clinical interest. Tn this paper, we present fetal magnetocardiographyperformed on a mother pregnant of twins with 26 weeks gestational age, measured inside a magnetically shielded room, by using two identical 31-channel low-T-c SQUID magnetometer systems. Each sensor array has been positionedover one of the fetuses, according to its heart position previously assessed with the aid of ultrasound measurements. The raw data is initially averaged in time and, afterwards, analyzed by means of time plots and isofield maps. The time recordings allow the study of the morphology of each fetus' cardiac signal and the cardiac time intervals. The resultant equivalent dipole obtained from the isofield maps indicates the position and orientation of each fetus heart. The results agree with the ultrasound analysis performed immediately before the measurements and used to obtain the approximate location of the fetuses' hearts. Since a distinct analysis of the cardiac electrical activity of each fetus could be achieved, the results indicate the potential of the fetal magnetocardiography in the individual antenatal diagnosis of each one of the fetuses of a twin pregnancy. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 02:14:50