Infant with biphasic stridor that is most pronounced over the upper trachea

Surgical image of double aortic arch
Surgical image through a left posterolateral thoracotomy shows the red vessel loops around the double aortic arch and the blue vessel loops around the ligamentum arteriosum. The posterior aortic arch was divided, causing an impressive release of the ring with the 2 ends of the posterior arch separating by 2 to 3 centimeters. The ligamentum arteriosum was then divided.

The diagnosis was double aortic arch.