Noninvasive in utero assessment of PR and QRS intervals from the fetal magnetocardiogram

Arthur Leuthold, Ronald T. Wakai, Chester B. Martin

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


Fetal cardiac waveform intervals were assessed from fetal magnetocardiogram (FMCG) recordings taken from 59 pregnant women at 17-41 weeks gestation. Beyond 27 weeks' gestation PR and QRS intervals, measured from averaged waveforms, could be obtained from all subjects; however, prior to 21 weeks' gestation the success rate was 50% or less due to low signal-to-noise ratio. QT interval could not be assessed accurately in most subjects. Weak, but statistically significant, correlations with gestational age were found for PR interval (n=145, R2=0.033, P=0.028) and QRS interval (n=145, R2=0.140, P<0.0005). Abnormal waveform morphology was documented in several patients with cardiac malformations. Copyright (C) 1999 Elsevier Science Ireland Ltd.

Original languageEnglish (US)
Pages (from-to)235-243
Number of pages9
JournalEarly Human Development
Issue number3
StatePublished - Apr 1 1999


  • Fetal electrocardiogram
  • Fetal magnetocardiogram
  • Fetal monitoring
  • Fetal rhythm


Dive into the research topics of 'Noninvasive in utero assessment of PR and QRS intervals from the fetal magnetocardiogram'. Together they form a unique fingerprint.

Cite this