MRI reveals hemodynamic changes with acute maternal hyperoxygenation in human fetuses with and without congenital heart disease.
Prenat Diagn
; 36(3): 274-81, 2016 Mar.
Article
em En
| MEDLINE
| ID: mdl-26701792
ABSTRACT
OBJECTIVE:
We investigated the physiologic impact of acute maternal hyperoxygenation (MH) in human fetuses with and without congenital heart disease (CHD) using fetal cardiac magnetic resonance (CMR) in order to explore the potential therapeutic benefits of chronic MH.METHODS:
We examined 17 normal and 20 late gestation human fetuses with CHD on a 1.5 T CMR system. Flows were measured in major fetal vessels using phase contrast MRI. The T2 of umbilical venous blood was measured using T2 mapping. The measurements were repeated during acute MH. The results were compared using a Student's t-test, with p-value ≤0.05 considered statistically significant.RESULTS:
At baseline, the umbilical venous T2 (oxygen saturation) was lower in CHD fetuses than in normals, with significant increase with MH (p = 0.01). Both groups showed significant increase in pulmonary blood flow during MH, which was more dramatic in CHD (p = 0.005). There was a reduction in ductus arteriosus flow in CHD during MH (p = 0.04). There was no significant difference in blood flow in any of the other major vessels.CONCLUSION:
This study suggests that fetal MR identifies the expected hemodynamic changes associated with acute MH. MRI could be useful as a method for monitoring the impact of chronic MH in fetuses with CHD.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Complicações na Gravidez
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Imageamento por Ressonância Magnética
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Hiperóxia
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Cardiopatias Congênitas
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Hemodinâmica
Tipo de estudo:
Observational_studies
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Prevalence_studies
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Risk_factors_studies
Limite:
Adult
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Female
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Humans
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Pregnancy
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article