Abstract
Doppler acquired velocity waveforms of fetal and maternal vessels have been analyzed as both a predictor and an index of fetal health. Increases in downstream impedance reflected by a decrease in placental tertiary villi arterioles or an obliterative angiopathy of the placenta are thought to be responsible for the increased impedance and hence the abnormal waveforms identified. We present a case of improvement of abnormal fetal velocity waveforms (including reversed diastolic flow in the fetal abdominal aorta). Despite improvement of umbilical and aortic waveforms there was evidence of placental disease with a decrease in the number of placental tertiary villi arterioles. The recovery of fetal waveforms was associated with maternal bed rest and oxygen therapy.
Published Version
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