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European Journal of Cardio-Thoracic Surgery, Vol 10, 784-790, Copyright © 1996 by European Association for Cardio-thoracic Surgery

ARTICLES

Surgery for aortic dissection with intimal tear in the transverse aortic arch

Y Okita, S Takamoto, M Ando, T Morota, F Yamaki, Y Kawashima and N Nakajima
Department of Cardiovascular Surgery, National Cardiovascular Center, Osaka, Japan.

OBJECTIVES: This study reports surgical experience of 72 cases of aortic dissection with intimal tear in the transverse aortic arch. METHODS: Of 325 patients with aortic dissection, 72 (22.2%) had a tear in the arch, including 27 with acute dissection and 45 with chronic dissection. Mean age at surgery was 60.8 +/- 14.1 years. The dissection was localized from the ascending aorta to the arch in 30 patients and extensive from the ascending aorta to the descending aorta in 42. Surgeries consisted of total arch replacement in 50 patients, hemiarch replacement in 20, and extra-anatomical bypass in 1. In the initial series, cardiopulmonary bypass for brain protection during arch procedures was selective cerebral perfusion (61 patients), but since July 1993 deep hypothermic circulatory arrest with retrograde cerebral perfusion was exclusively utilized (8 patients). RESULTS: Hospital mortality was 9.7%, 11.1% of the patients who had acute dissection and 8.8% with chronic dissection. There has been no mortality since February 1993. The mean follow-up period was 51 +/- 37 months, and there were 3 late deaths. The 5 and 10 year survival rate was 85.3 +/- 4.8 in all patients, 84.3 +/- 8.9% with acute dissection, and 85.5 +/- 5.7% with chronic dissection. The 5 and 10 year survival was 79.8 +/- 7.1 with extensive dissection, and 93.5 +/- 6.5% with localized dissection. During follow-up, 6 patients underwent subsequent aortic surgeries. The freedom from reoperation at 5 years and at 10 years was 91.4 +/- 4.8% and 65.6 +/- 14.4%, respectively. In patients with acute dissection it was 92.3 +/- 7.4% and 61.5 +/- 25.6% at 5 years and 10 years, while with chronic dissection it was 87.0 +/- 7.0% and 44.0 +/- 17.3% at 5 years and 10 years, respectively (n.s.). The freedom from subsequent reoperation for the aorta in all patients was 91.4 +/- 4.8% at 5 years and 10 years was 65.6 +/- 14.4%. With acute dissection it was 92.3 +/- 7.4% at 5 years and 61.5 +/- 25.6% at 10 years, while that with chronic dissection it was 91.3 +/- 5.9% and 65.7 +/- 16.8% at 5 years and 10 years respectively (n.s.). The freedom from all reoperations with extensive dissection at 5 years and 10 years was 86.6% +/- 7.2% and 34.2 +/- 17.3%, respectively, moreover, the freedom from reoperations with localized dissection at 5 and at 10 years was 90.0 +/- 9.5% (n.s.). However, the freedom from subsequent aorta reoperation with extensive dissection at 5 years and 10 years was 86.6 +/- 7.2% and 56.0 +/- 16.0%, respectively, while with localized dissection it was 100% at 10 years (P < 0.01). CONCLUSION: Early and late surgical result for arch dissection was satisfactory with a surgical principle of resecting the aortic segment that contains the initial intimal tear and graft replacement.

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