Résumé
A neonate with absent pulmonary valve syndrome (APVS) and features of tetralogy of Fallot presented respiratory distress. The prolonged need for mechanical ventilation was an indication for surgical repair. Preoperative thoracic CT imaging showed nearly complete closure of the distal trachea, compressed by the aneurysmal dilatation of the pulmonary arteries, and its reopening after ventilator pressure was increased. Management of APVS may require high-pressure ventilation to prevent bronchial collapse due to compression by the pulmonary arteries. In this context, thoracic CT imaging is very useful for adjusting ventilation support so that surgical repair can be performed in optimal conditions.