The following video tutorial presents the surgical correction of the left circumflex aortic arch in a 6-month-old boy with severe respiratory distress and stridor. The diagnosis was confirmed using cardiac catheterization and computed tomography. Intraoperative bronchoscopy showed marked compression of the trachea. An operation was planned to translocate the aortic arch anteriorly and to close the atrial septal defect. After a median sternotomy, the mediastinal structures were …