JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Fetal pulmonary valve stenosis or atresia with intact ventricular septum: Predictors of need for neonatal intervention.

OBJECTIVES: To compare the fetal echocardiographic measurements and neonatal outcome of fetuses with diagnosis of critical pulmonary stenosis (CPS/IVS) and pulmonary atresia with intact ventricular septum (PA/IVS) to identify the predictors of neonatal ductus dependence and the need for neonatal intervention.

METHODS: Forty-four fetuses with a diagnosis of membranous PA/IVS or CPS/IVS referred to Shanghai Xinhua Hospital Affiliated to Shanghai Jiaotong University between June 2009 and November 2014 were respectively analyzed. We analyzed their fetal and pediatric echocardiographic features and clinical features after birth.

RESULTS: Among the 29 infants in the final analysis, 19 were ductal dependent and were diagnosed as CPS/IVS or PA/IVS after birth. Ten patients with fetal CSP/IVS were ductal independent and were diagnosed as pulmonary stenosis after birth. In midtrimester, significance was only detected in pulmonary valve (PV) regurgitation between 2 groups (P = .009). The fetuses with PV regurgitation in midtrimester were more likely to be ductal independent (odds ratio = 6.67; P = .010) than those with absence of PV regurgitation in the midtrimester scan. In late trimester, the infants in ductus-independent group had better fetal right ventricular development than those in ductus dependent group. The right ventricle over left ventricle length ratio in last scan over 0.86 had the best capability in predicting ductus independence during neonatal period with help of receiver-operating characteristic curve and the logistic regression analysis.

CONCLUSION: Among fetuses with pulmonary valve stenosis and right ventricle dysplasia at the time of first fetal echo in midtrimester, use of pulmonary valve regurgitation can identify who will be ductal dependent at births. In late trimester, right ventricle over left ventricle length ratio less than 0.86 had the best capability of predicting neonatal ductal dependence. Fetuses with reversed ductus arteriosus flow direction in late trimester were more likely to be ductus dependent after birth.

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