A full-term male infant becomes cyanotic immediately after birth. His mother states she had no access to prenatal care. Her pregnancy was otherwise uncomplicated. On examination, the newborn is tachypneic and tachycardic, and his oxygen saturation is 75%. He is grunting and has supracostal retractions. He has a barrel-shaped chest with decreased breath sounds on the left side. His abdomen is scaphoid, and his heartbeat is displaced to the right. The amniotic fluid is clear.