Patient: My child was born on July 16, 2008 and is now just 2 months old. He was hospitalized for 9 days on the ninth day of life due to aspiration pneumonia, and for 7 days on the 40th day of life due to pneumonia. The results of the examination were: a continuous interruption in the middle of the atrial septum, measuring 1.1 mm in size, a hitch-like change in the fossa ovalis above it, and a separation gap measuring 1 mm. color flow showed a left-to-right shunt at the atrial level. The distal end of the second pulmonary artery is seen to be connected to the descending aorta by a tubular port, with an internal diameter of approximately 1 mm. color flow shows a left-to-right shunt at the level of the great vessels, with a Vmax of 124/s. PG of 6.2 mm Hg. Is the child’s condition serious? Will it affect growth and development? What is the best time for treatment? The child is growing normally, eating and drinking well, but he is crying, and he gets blue around his mouth when he cries. Specialist: We recommend regular review to follow the development of the disease. If pulmonary hypertension persists, surgery should be performed before the age of 1 year.