Figure 5. New diagnosis of type A interrupted aortic arch with large systemic collaterals in a 4-month-old girl. (a) Sagittal multiplanar reformation and (b) volume-rendered three-dimensional images show aortic interruption (arrow) just beyond the left subclavian artery (S) with dilated posterior collateral intercostal arteries (arrowheads). A, aortic arch; DA, descending aorta.