RESUMO
The patient was a 50-year-old man who had undergone ascending aortic replacement and coronary artery bypass grafting at another hospital for acute type A aortic dissection 4 years before. He was diagnosed with hemolytic anemia 1 year after surgery for his progressive anemia and high serum lactate dehydrogenase level. He was referred to our hospital because frequent transfusion was required. A computed tomography showed severe kinking of the graft (110°), which we considered to be the cause of hemolysis. Peak pressure gradient was 60 mmHg. To remove the cause of hemolysis and to precipitate thrombosis of the residual false lumen, we performed re-ascending aortic replacement and total arch replacement with a frozen elephant trunk. The postoperative course was uneventful and hemolysis resolved soon after the operation. Surgeons should be aware that severe kinking of a Dacron graft can be a cause of hemolysis.
RESUMO
A man in his fifties was diagnosed with retrograde type A acute aortic dissection. He underwent total arch replacement using the Gelweave Lupiae graft and staged thoracic endovascular aortic repair. Five days after discharge from the hospital, he was referred to our institution because of severe hemolytic anemia. Electrocardiography-gated computed tomography angiography demonstrated significant kinking of the graft adjacent to the proximal anastomotic site. Cine cardiac magnetic resonance imaging showed that graft kinking deteriorated during systole. We concluded that his hemolytic anemia was caused by graft kinking and surgical repair was required. The graft was transected at the kinking site and then reconstructed. After surgical repair, the hemolytic anemia improved immediately.
RESUMO
A 62-year-old woman was referred to our hospital for treatment of hemolytic anemia 10 years after total arch replacement for acute aortic dissection. The cause of hemolysis was confirmed to be mechanical damage of red blood cells at the kinked graft. Because aortic valve regurgitation and occlusion of the left subclavian artery were also found, resection of the kinked graft, aortic valve replacement and reconstruction of the left subclavian artery were carried out concomitantly at reoperation. Her postoperative course was uneventful, and hemolysis resolved soon after the operation.