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Ann Thorac Surg 1997;64:503-507
© 1997 The Society of Thoracic Surgeons

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Original Articles: Cardiovascular

Arch Growth After Staged Repair of Interrupted Aortic Arch Using Carotid Artery Interposition

Department of Cardiovascular Surgery and Section of Cardiology, Children's Hospital of Michigan and Wayne State University, Detroit, Michigan

Accepted for publication January 21, 1997.

Background. Between 1980 and 1990, our practice was to perform carotid artery interposition as part of a staged repair of interrupted aortic arch with various associated cardiac defects.

Methods. This procedure was used in 16 patients with IAA type B. The median age at operation was 4.5 days and the median weight, 3.2 kg. Ten of the patients had an associated ventricular septal defect. Six more had complex anatomy. There were two deaths at carotid interposition, two interim deaths, and two deaths after intracardiac repair. Preoperative echocardiographic and angiographic studies were compared with postoperative studies in 11 survivors of arch repair to assess sequential growth of the interposed carotid artery. Measurements of the carotid artery were normalized to the descending aorta.

Results. Preoperatively, the left carotid artery had a median diameter of 3.7 mm and was 42.9% of the descending aortic diameter. Postoperative studies performed at a median age of 5.7 months disclosed that the interposed carotid artery had grown to a median diameter of 7.0 mm and was 69.6% of the diameter of the descending aorta (normal 81%). On follow-up at a median time of 4 years, 6 of 9 patients have no gradient by blood pressure measurements or echocardiographic Doppler studies, and 3 have modest gradients. No patient has required revision of the arch repair.

Conclusions. Survival is good after carotid artery interposition for interrupted aortic arch, and growth of the carotid artery approaches that of a normal arch. Carotid artery interposition is a viable alternative for repair of this lesion should primary definitive repair not be feasible.

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