Calcium-Sensitive K+ Channel Expression Is Decreased in an Ovine Model of Persistent Pulmonary Hypertension of the Newborn

Prevalence of Persistent Pulmonary Hypertension of the Newborn and Associated Factors in Term Neonates Born in Southeast of Iran, 2020

 Background and purpose: Infants with persistent pulmonary hypertension (PPHN) are readmitted to hospital three times more than other infants or die after discharge. The disease imposes a high cost on families and health systems. In this study, for the first time, the prevalence of PPHN and associated factors were investigated in mature neonates born in southeast of Iran. Materials and methods...

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 ...

Persistent Pulmonary Hypertension of the Newborn (pphn)

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...

Contribution of the K(Ca) channel to membrane potential and O2 sensitivity is decreased in an ovine PPHN model.

Ca2+-sensitive K+ (K(Ca)) channels play an important role in mediating perinatal pulmonary vasodilation. We hypothesized that lung K(Ca) channel function may be decreased in persistent pulmonary hypertension of the newborn (PPHN). To test this hypothesis, pulmonary artery smooth muscle cells (PASMC) were isolated from fetal lambs with severe pulmonary hypertension induced by ligation of the duc...