Ligating the Ductus Arteriosus before Birth Causes Persistent Pulmonary Hypertension in the Newborn Lamb

Patent ductus arteriosus in a lamb: A case report

Patent ductus arteriosus (PDA) is a persistent patency of a vessel normally present in the fetus that connects the pulmonary arterial system to the aorta. The ductus arteriosus fails to close at birth when breathing commences and placental blood circulation is removed. Closure of the ductus arteriosus arises in response to decline pulmonary vascular resistance and increased systemic vascular re...

Persistent Pulmonary Hypertension in the Newborn

Persistent pulmonary hypertension of the newborn (PPHN) is characterized by elevated pulmonary vascular resistance resulting in right-to-left shunting of blood and hypoxemia. PPHN is often secondary to parenchymal lung disease (such as meconium aspiration syndrome, pneumonia or respiratory distress syndrome) or lung hypoplasia (with congenital diaphragmatic hernia or oligohydramnios) but can al...

Familial persistent ductus arteriosus.

The occurrence of isolated persistent ductus arteriosus in three generations of one family with surgical correction is described. The high incidence of the malformation in this family suggests autosomal dominant inheritance rather than a polygenic mode of inheritance.

The syndrome of patent ductus arteriosus with pulmonary hypertension.

Persistent Pulmonary Hypertension of the Newborn

Introduction: Persistent pulmonary hypertension of the newborn (PPHN) was first described by Gersony et al 1 of persistence of the fetal circulation in 1969. It is a clinical syndrome characterized by respiratory distress, hypoxemia, elevated pulmonary vascular resistance and a right to left shunting of venous blood across the foramen ovale and/or ductus arteriosus. The etiology of PPHN is not ...