摘要篇首： Aortopulmonary window (APW) is a rare congenital defect, found in 0.2% of patients with congenital heart disease, in which a communication exists between the ascending aorta and the pulmonary artery trunk with normal separation of the aortic and pulmonary valves.1 APW is classified into three types according to proximal, distal or total defects. Up to 50% of APW patients have patent ductus arteriosus (PDA), ventricular septal defects (VSD), aortic atresia, aortic valve stenosis, atrial septal defect, pulmonary valve stenosis, complete atrioventricular septal defect or tetralogy of Fallot.1-3 APW allows a large left to right shunt that causes pulmonary hypertension and chronic heart failure. Irreversible pulmonary vascular disease may occur at an early age. Cardiac catheterization and retrograde aortography confirm the diagnosis and the associated disorders. Prompt operative treatment achieves excellent long-term results.4 A ratio of pulmonary vascular resistance to systemic vascular resistance exceeding 0.4 is the main risk factor.5 We report the first case of APW confirmed by ultra-fast computed tomography (UFCT) before surgery following failure of transaortic patch closure due to aortic narrowing. UFCT after surgery confirmed its success.