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FIGURE 45-1 Classification of aortic dissection. DeBakey type I and Stanford type A include dissections that involve the proximal aorta, arch, and descending thoracic aorta. DeBakey type II only involves the ascending aorta; this dissection is included in Stanford type A. DeBakey type III and Stanford type B include dissections that originate in the descending thoracic and thoracoabdominal aorta regardless of any retrograde involvement of the arch. These are subdivided into a and b depending on abdominal aortic involvement. (Reproduced with permission from Stone C, Borst H: Dissecting aortic aneurysm, in Edmunds LJ Jr (ed): Cardiac Surgery in the Adult. New York, McGraw-Hill, 1997; p 1125.)
