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Ann Thorac Surg 2004;78:837-845
© 2004 The Society of Thoracic Surgeons

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Original article: cardiovascular

Determinants of early and late outcome for reoperations of the proximal aorta

^a Department of Cardiothoracic and Vascular Surgery, The University of Texas at Houston Medical School, Memorial Hermann Hospital, Houston, Texas, USA

Accepted for publication March 30, 2004.

^* Address reprint requests to Dr Safi, Department of Cardiothoracic and Vascular Surgery, The University of Texas at Houston Medical School, UTH Medical Center, 6410 Fannin St, Suite 450, Houston, TX 77030, USA.
Hazim.J.Safi{at}uth.tmc.edu

Presented at the Fiftieth Annual Meeting of the Southern Thoracic Surgical Association, Bonita Springs, FL, Nov 13–15, 2003.

BACKGROUND: The purpose of this study was to investigate the cause of ascending aorta and aortic arch reoperations and to identify determinants of early and late outcome.

METHODS: Between January 1991 and March 2003 we repaired aneurysms of the proximal aorta in 597 patients. Of these patients, 104 had reoperations for replacement of the ascending aorta, aortic root, or transverse aortic arch. Previous surgery was defined as any previous cardiac or proximal aortic repair. Median age was 60 years, and 29 of the patients (28%) were female. Indications for reoperation and replacement of the proximal aorta included acute type A dissection in 6 patients (5.8%), aneurysm with chronic dissection in 60 (57.7%), progression of aneurysm in 23 (22.1%), infection in 12 (1.5%), inflammatory disease in 2 (1.9%), and atheromatous disease in 1 (1.0%). Reoperations included aortic root replacement in 20 patients (19.2%), total arch replacement with elephant trunk in 28 (26.7%), ascending and proximal arch in 39 (37.5%), and ascending aorta in 27 (26.0%). The median interval between operations was 69 months. Retrograde cerebral perfusion was used in 80 (77%) cases.

RESULTS: Chronic dissection was the most common indicator for reoperation in our population, followed by progression of aneurysm and infection. Thirty-day and in-hospital mortality was 13.5% (14 of 104) and 15.4% (16 of 104), respectively. Chronic obstructive pulmonary disease, renal dysfunction, and increased pump time were risk factors for mortality. Median follow-up was 5.02 years. Eight patients died during that period. Estimated survival at 1, 5, and 10 years was 83%, 80%, and 62%, respectively. Freedom from second proximal reoperations was 97.1% (10 of 104). Freedom from subsequent distal thoracic aortic repair was 84.6% (8 of 104).

CONCLUSIONS: Reoperations of the ascending aorta and aortic arch can be performed safely with good long-term results. Patients with previous proximal aortic dissection repair need long-term surveillance. Renal dysfunction and chronic obstructive pulmonary disease must be carefully considered before reoperations of the proximal aorta.

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