Operation for mid-arch coarctation

Background. Coarctation occurring within the aortic arch is rare and may present difficulties during surgical repair. We describe the operative technique and outcome in 6 patients with this unusual anomaly. Methods. Five patients had antegrade perfusion with circulatory arrest. Three patients with presubclavian narrowing (one presenting with type B dissection) were operated through extended left thoracotomy. Two precarotid and paracarotid lesions were approached through a median sternotomy. All patients were perfused antegradely from the ascending aorta and operated with hypothermic circulatory arrest. One patient who had a complex presubclavian coarctation after two previous repairs received an ascending aorta to abdominal aorta bypass graft without cardiopulmonary bypass. Results. All patients survived operation and are well at a mean follow-up of 3.3 years after the procedure. None had cerebral problems or spinal cord injury. Renal function was unchanged. The mean (± standard error of the mean) resting gradient across the coarctation decreased from 42 ± 4.0 mm Hg to 6 ± 1.2 mm Hg (p = 0.0004). Conclusions. Hypothermic circulatory arrest using antegrade ascending aortic perfusion allows safe and effective repair of mid-arch coarctation. Complicated reoperations can be managed safely using ascending-to-abdominal aortic bypass.