[Graft Kink with Hemolytic Anemia Caused by Enlargement of the Residual False Lumen in the Aortic Root:Report of a Case].

A 67-year-old male underwent ascending aortic replacement for Stanford type A acute aortic dissection four years ago. Residual false lumen in the aortic root and mild to moderate aortic regurgitation were noted postoperatively. Two and a half years later, he presented with hemolytic anemia and shortness of breath. Computed tomography (CT) revealed aneurysmal aortic root and severely kinked vascular prosthesis, and echocardiography showed severe aortic regurgitation. It was considered that the proximal residual false lumen gradually enlarged, and the graft was pushed up distally and kinked, resulting in hemolytic anemia. Surgical treatment was indicated because of deteriorating shortness of breath due to hemolytic anemia (Hb 6.7 g/dl, LDH 1,528 U/l) and aortic regurgitation. Aortic root replacement was successfully performed and hemolytic anemia improved immediately after surgery.