congenital pulmonary veins atresia or stenosis
Congenital pulmonary vein (PV) stenosis or atresia is a rare progressive life-threatening great vessels anomaly characterized by narrowing and obstruction of one or more normally positioned PV at their junction with the left atrium, that usually presents during early infancy with dyspnea, tachypnea, and repeated pulmonary infections, and eventually, when all PV of one lung are affected, results in pulmonary hypertension (PH) and consecutive pulmonary arterial hypertension (PAH). It may manifest as an isolated lesion or associated with other cardiac defects such as congenital pulmonary venous return anomaly and septal defects.