Single-stage surgical repair of congenital aortopulmonary window associated with interrupted aortic arch in two toddlers: a case report.

Congenital aortopulmonary window (APW) associated with interrupted aortic arch (IAA) is a rare and severe form of congenital heart disease. The optimal surgical timing and strategy remain challenging, particularly beyond infancy. We report two toddlers diagnosed with APW and IAA who underwent one-stage surgical repair. At the time of surgery, the children were 17 and 22 months old, with body weights of 6.6 kg and 8.0 kg, respectively. Both patients survived and experienced no perioperative complications. During postoperative follow-up of 12 and 19 months, respectively, the children demonstrated New York Heart Association (NYHA) class I cardiac function, with normal intracardiac anatomy and no evidence of residual shunting, vascular stenosis, or pulmonary hypertension. These cases indicate that delayed one-stage repair beyond infancy can be performed safely and effectively in selected patients with preoperative evaluation and individualized surgical planning.