1 | INtroduction
VRs are congenital vascular abnormalities that are rarely with an incidence of 0.02 to 0.1%1,2. VRs include two types: complete and incomplete. Complete vascular ring(CVR) can encircle thoracic esophagus and trachea completely, and can result to compression of the trachea or esophagus. Most infants present with feeding issues or airway obstruction in the first year of birth3.