Details

Autor(en) / Beteiligte

• Wladimiroff, Juriy W.
• Huisman, Tjeerd W.A.
• Stewart, Patricia A.

Titel

Intracerebral, aortic, and umbilical artery flow velocity waveforms in the late-first-trimester fetus

Ist Teil von

• American journal of obstetrics and gynecology, 1992, Vol.166 (1), p.46-49

Ort / Verlag

Philadelphia, PA: Mosby, Inc

Erscheinungsjahr

1992

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Objectives: Our objectives were to determine the success rate in obtaining flow velocity waveforms in the first-trimester fetal circulation and to establish possible preferential flow to the fetal cerebrum at this early stage of gestation. Study Design: Flow velocity waveform recordings were made in the umbilical artery, fetal descending aorta, and fetal intracerebral arteries in 30 normal pregnancies between 11 and 13 weeks of gestation. Results: Technically acceptable waveforms were obtained from the descending aorta in 15 fetuses, from the intracerebral circulation in 17 fetuses, and from the umbilical artery in all 30 fetuses. Absent end-diastolic velocities in the descending aorta and umbilical artery were associated with forward flow throughout the cardiac cycle in intracerebral arteries. Conclusion: A relatively low cerebral vascular resistance in the late-first-trimester normal fetus is suggested.