title: Diagnosis of functional pulmonary atresia using hyperventilation and Doppler ultrasound.
mesh_terms: D006349:Heart Valve Diseases / Q000175:diagnosis*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011664:Pulmonary Valve / Q000473:pathology*; D012121:Respiration, Artificial; D014463:Ultrasonography / Q000379:methods