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Relationship between aortic isthmus and ductus venosus velocity waveforms in severe growth restricted fetuses
Author(s) -
Rizzo Giuseppe,
Capponi Alessandra,
Vendola Marianne,
Pietrolucci Maria Elena,
Arduini Domenico
Publication year - 2008
Publication title -
prenatal diagnosis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.956
H-Index - 97
eISSN - 1097-0223
pISSN - 0197-3851
DOI - 10.1002/pd.2121
Subject(s) - ductus venosus , fetus , cardiology , medicine , gestational age , umbilical artery , diastole , intrauterine growth restriction , waveform , pregnancy , biology , physics , blood pressure , genetics , quantum mechanics , voltage
Objective To evaluate the incidence of abnormalities in velocity waveforms from ductus venosus (DV) and aortic isthmus (AoI) in fetuses with intrauterine growth restriction (IUGR) and their reciprocal temporal relationship. Methods DV and AoI velocity waveforms were recorded in 31 IUGR fetuses characterized either by absent end diastolic (20) or reverse flow (11) in umbilical artery. Abnormal velocity waveforms in DV and AoI were defined in presence of reverse diastolic flows. Results Abnormal DV velocity waveforms were present in 10 fetuses and were always associated with abnormalities. Abnormal AoI flows were also present in 10 fetuses of the remaining 21 fetuses with normal DV velocity waveforms (47.6%). Longitudinal monitoring of fetuses with normal DV flows showed a significantly shorter time interval in the onset of reverse flow in DV when abnormalities in AoI were present (4 vs 14 days p = 0.001) irrespectively of gestational age or other potential confounding variables. Conclusions Our data suggest that AoI velocity waveforms become abnormal at an earlier stage of fetal compromise than DV. Copyright © 2008 John Wiley & Sons, Ltd.