PDA 1. You're caring for a 2-day-old infant with a large patent ductus arteriosus. The mother of the infant is anxious and asks you to explain her child's condition to her again. Which statement below BEST describes this condition?  A. "The vessel connecting the aorta and pulmonary vein has closed prematurely, which is leading to increased blood flow to the lungs."  B. "The vessel connecting the aorta and pulmonary artery has failed to close at birth, which is leadin...