Key result
Advancing gestational age linearly increased all fetal ductus arteriosus flow velocity parameters except pulsatility index, with end-diastolic velocities present in all cases by 17 weeks.
Population
298 pregnant women between 9 and 25 weeks of gestation (231 with technically acceptable recordings)
Design
Cross-sectional
Authors
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May inform early fetal echocardiography interpretation; leaves open prognostic value of abnormal ductal patterns.
Observational (n=298)
Fetal ductus arteriosus flow velocity waveforms undergo significant morphological changes during the first half of pregnancy, characterized by the appearance of end-diastolic velocities between 13 and 17 weeks.
Brezinka et al. (1992) conducted an observational in Pregnancy (n=298). Advancing gestational age was evaluated on Ductus arteriosus flow velocity parameters. Advancing gestational age linearly increased all fetal ductus arteriosus flow velocity parameters except pulsatility index, with end-diastolic velocities present in all cases by 17 weeks.
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