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Classifying cases of fetal Wolff-Parkinson-White syndrome by estimating the accessory pathway from fetal magnetocardiograms.
Kandori, A; Hosono, T; Chiba, Y; Shinto, M; Miyashita, S; Murakami, M; Miyashita, T; Ogata, K; Tsukada, K.
Affiliation
  • Kandori A; Central Research Laboratory, Hitachi, Ltd, Tokyo, Japan. kandori@crl.hitachi.co.jp
Med Biol Eng Comput ; 41(1): 33-9, 2003 Jan.
Article in En | MEDLINE | ID: mdl-12572745
ABSTRACT
The paper presents an evaluation of the possibility of using fetal magnetocardiogram (FMCG) signals to estimate and classify the accessory pathway in fetal Wolff-Parkinson-White (WPW) syndrome. The FMCG signals of two fetuses with WPW syndrome (type A) were detected using a 64-channel superconducting quantum-interference device system. An average across the cycles of these signals was taken to obtain clear WPW signals. To determine the direction and position of the accessory pathway in a fetal heart accurately, the accessory pathway and activated pathway at the peak of the QRS complex thus obtained were estimated for each fetus, using a single-dipole model. The phase angle (about 90 degrees) between the equivalent current dipoles (ECDs) was the same for both fetuses. This angle suggested that the accessory pathway is in the left side of the heart, i.e. that the pathway exists in the left ventricle, which indicates type A WPW syndrome. Identification of the position of the accessory pathway in a fetus with WPW syndrome from the angle between the ECD of the accessory pathway and the ECD of the peak in the QRS complex was thus demonstrated.
Subject(s)
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Collection: 01-internacional Database: MEDLINE Main subject: Prenatal Diagnosis / Wolff-Parkinson-White Syndrome / Fetal Diseases / Heart Conduction System Type of study: Diagnostic_studies / Evaluation_studies / Prognostic_studies Limits: Humans Language: En Journal: Med Biol Eng Comput Year: 2003 Type: Article Affiliation country: Japan
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Collection: 01-internacional Database: MEDLINE Main subject: Prenatal Diagnosis / Wolff-Parkinson-White Syndrome / Fetal Diseases / Heart Conduction System Type of study: Diagnostic_studies / Evaluation_studies / Prognostic_studies Limits: Humans Language: En Journal: Med Biol Eng Comput Year: 2003 Type: Article Affiliation country: Japan