Despite similar morbidity and perioperative mortality rates, outcomes following endovascular treatment of acute complicated type B dissection varied with the extent of the dissection. Persistent FL perfusion below the stent-graft, associated with aneurysm expansion and the need for re-intervention, was seen most often in type IIIb dissection. Patients with the more limited type IIIa dissection or IMH were likely to be cured by endovascular therapy.

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