[Acute type A aortic dissection after replacement of descending thoracic aorta for type B aortic dissection].

Two cases of acute type A aortic dissection after replacement of descending thoracic aorta for type B dissection were reported. One case involved a 75-year-old male who had hypertension. The second case involved a 33-year-old female with a familial history of thoracic aneurysms. Both patients underwent simultaneous graft replacement of the ascending aorta and total aortic arch using selective perfusion to the brain. Both patients survived the operations, and the postoperative courses were satisfactory. Acute type A dissection after replacement of descending thoracic aorta for type B dissection is rare, and careful and long-term follow-up is needed for the patients.