Absent Pulmonary Valve Syndrome in a Fetus: A Case Report and Literature Review.

Background: The main characteristics of absent pulmonary valve syndrome (APVS) include the absence or hypoplasia of the pulmonary valve, stenosis of the pulmonary valve annulus, and aneurysmal dilatation of the pulmonary trunk and its branches. In the more common type 1, the tetralogy of Fallot-like type, there is a ventricular septal defect, overriding aorta, pulmonary arterial dilatation, and absence of ductus arteriosus, The second type has an intact ventricular septum, less pulmonary artery dilatation, and a patent ductus arteriosus, with or without tricuspid atresia.

Methods: This APVS had an intact ventricular septum with an absent ductus arteriosus.

Conclusions: The APVS with intact ventricular septum with an absent ductus arteriosus may represent a third type of APVS.