Aberrant left subclavian artery sparing in right-sided interrupted aortic arch repair.

A right-sided interrupted aortic arch is rare, and it may have an associated aberrant left subclavian artery (ALSCA). An ALSCA is most often sacrificed at biventricular repair despite the potential danger of poor left upper-extremity growth. We report a case of ALSCA preservation with extensive dissection during aortic arch repair using direct anastomosis.