Abstract 11245: Normal Findings in Late Gestation Fetal Echocardiography
Introduction: Fetal echocardiography (FE) provides detailed information about cardiac structure and function in-utero. Limited information is available regarding normal findings late in pregnancy. We sought to identify and describe common FE findings in late gestation.
Methods: Fetuses with structurally normal hearts at mid-gestation were identified within a subset of pregnant women in a prospective study. Atrioventricular (AV) valves, right and left atrium (RA/LA), aortic isthmus (AoI) and ductal arch (DA) diameters and flow abnormalities, septum primum aneurysm (SPA), and presence/grade of tricuspid regurgitation (TR) were assessed. Linear and logistic regression analyses were used to characterize change in quantitative and qualitative FE parameters.
Results: 40 fetuses were studied. Each had a FE completed before and after 34 weeks gestation. Studies were compared. RA/LA and tricuspid/mitral valve (TV/MV) ratios increased with GA (p<0.001). Increased AoI and DA diastolic flow, and trivial/mild TR were more frequently identified after 34 weeks gestation. Increased AoI diastolic flow, DA narrowing, DA diastolic flow, TR, and SPA increased linearly with GA (p<0.001).
Conclusion: Mild RA/LA and AV valve disproportion, trivial/mild TR, isolated AoI diastolic flow, mild DA narrowing, and SPA are frequently seen after 34 weeks GA. This suggests these FE findings in isolation are likely normal as physiologic changes occur in late gestation. Figure 1: RA/LA disproportion and AV disproportion increase with gestational age. P<0.001.
Author Disclosures: L. Tague: None. M.T. Donofrio: None. A. Fulgium: None. R. McCarter: None. C. Limperopoulos: None. D. Schidlow: None.
- © 2016 by American Heart Association, Inc.