[Intrauterine restrictive foramen ovale: cause of neonatal pulmonary hypertension].

Premature closure of the foramen ovale (FO) or intrauterine restrictive FO is a rare entity of unknown etiology. This pathology is associated with an elevated risk of pulmonary hypertension, which can cause congestive heart failure with hydrops and fetal death. Patients with restrictive intrauterine FO may develop left ventricle diastolic dysfunction and pulmonary edema. A newborn with increased right cavities in the prenatal ultrasound is presented. In postnatal echocardiogram, dilatation of right cavities was confirmed with pulmonary hypertension in the systemic range and immobile interatrial septum with closed FO. After 9 days of persistent respiratory distress, an echocardiogram was performed with improvement of pulmonary hypertension but with mild biventricular and diastolic and systolic dysfunction of the left ventricle with pulmonary edema. Diuretic treatment was decided, with normalization of ventricular function.