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Abnormal first‐trimester ductus venosus blood flow: a risk factor for adverse outcome in fetuses with normal nuchal translucency
Author(s) -
Oh C.,
Harman C.,
Baschat A. A.
Publication year - 2007
Publication title -
ultrasound in obstetrics and gynecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.202
H-Index - 141
eISSN - 1469-0705
pISSN - 0960-7692
DOI - 10.1002/uog.4034
Subject(s) - ductus venosus , medicine , aneuploidy , fetus , turner syndrome , nuchal translucency measurement , obstetrics , cardiology , pregnancy , first trimester , biochemistry , genetics , chemistry , gene , chromosome , biology
Objectives First‐trimester nuchal translucency thickness (NT) is a potent tool for assessment of fetal risks of aneuploidy and other adverse outcomes. When NT is increased, Doppler assessment of the ductus venosus (DV) enhances the prediction specificity for Down syndrome. This study assessed abnormal Doppler DV waveform as a predictor of adverse outcome when the NT is normal. Methods This was a case–control study of 2505 consecutive patients undergoing NT screening in our certified first‐trimester screening program. First‐trimester Doppler assessment of DV was performed and atrial systolic velocity was rated as antegrade (normal) or absent/reversed (DV‐RAV; abnormal). Each case with normal NT (< 95 th percentile) and DV‐RAV was matched with two controls with respect to maternal age within 1 year, NT within 0.2 mm, crown–rump length within 3 mm, and closest calculated aneuploidy risk. Outcomes for paired variables were compared using t ‐test and Chi‐square test. Results Forty‐seven (1.9%) patients had normal NT and DV‐RAV. After exclusion of three cases with obvious first‐trimester anomalies and two with incomplete outcome data, 42 remained for analysis. Adverse outcome included cardiovascular defects ( n = 6), fetal growth restriction ( n = 3), renal anomaly ( n = 2), aneuploidy ( n = 3) and multiple defects ( n = 3), in a total of 11/42 cases (26.2%). Cardiac abnormalities, renal abnormalities and perinatal death were all significantly more common in the study group (all P < 0.05). Conclusions Abnormal first‐trimester DV Doppler findings appear to predict adverse outcome independently of a normal NT. These patients need detailed mid‐trimester assessment of fetal anatomy with formal echocardiography, and subsequent follow‐up. Copyright © 2007 ISUOG. Published by John Wiley & Sons, Ltd.