Reoperative techniques for complications after arterial switch

Mavroudis, C.; Stewart, R. D.; Backer, C. L.; Rudra, H.; Vargo, P.; Jacobs, M. L.

Ann Thorac Surg. 2011 Sep 29; 92(5):1747-55

Abstract

BACKGROUND: The purpose of this study is to review our experience with late reoperations after the arterial switch operation (ASO) and to introduce reparative solutions adapted from previous techniques. METHODS: A retrospective study was performed on 23 patients who underwent late reoperations after ASO between 1983 and 2010. Eighteen patients were from our concomitantly reported cohort of 258 ASO patients and 5 came from distant referrals. RESULTS: Twenty-seven reoperations on 23 patients were performed for lesions relating to coronary arteries (9 procedures, 7 patients), the neoaortic root (12 procedures, 10 patients), and the right ventricular outflow tract (6 procedures, 6 patients). Four patients died: 1 from an exsanguinating gastric ulcer 4 years after prosthetic valve replacement; 1 from coronary occlusion one month postoperatively from an unroofed intramural left main coronary artery; and 2 after supravalvar pulmonary artery stenosis repair complicated by coexisting left ventricular dysfunction from the original ASO. CONCLUSIONS: The ASO remains the treatment of choice for transposition of the great arteries and its variants. While the incidence of late reintervention is low, a subset of patients will require operations that extend the principles of myocardial revascularization, left ventricular outflow tract reconstruction, and relief of pulmonary stenosis.

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