Branched Endovascular Therapy of the Distal Aortic Arch: Preliminary Results of the Feasibility Multicenter Trial of the Gore Thoracic Branch Endoprosthesis.

BACKGROUND: Endovascular treatment for aortic arch aneurysms often requires adjunctive use of hybrid debranching procedures to maintain branch vessel perfusion. This study describes early results with a novel branched arch endograft for total endovascular repair of distal arch aneurysms.

METHODS: This US feasibility multicenter clinical trial evaluated 22 patients (mean age, 74.1 ± 10.5 years; 54.5% male) undergoing branched thoracic endovascular aortic repair in Ishimaru zone 2. This endograft was designed with a single side branch designed to facilitate aortic coverage proximal to the left subclavian artery while maintaining branch vessel patency. The pathologic features treated included fusiform (n = 10) and saccular (n = 12) aneurysms, with a mean aortic diameter of 5.7 ± 1.1 cm. The mean preoperative left-to-right brachial index was 1.0 ± 0.1.

RESULTS: The mean total treatment length was 17.6 ± 8.9 cm; 8 patients were treated with a single 10-cm graft for isolated arch disease. The primary endpoint of device delivery and branch vessel patency was achieved in 100% of patients, without 30-day death, stroke, or permanent paraplegia. The median duration of hospitalization was 4.0 days. Type I endoleaks at completion angiography were observed in 4 patients, and all resolved by 1 month without reintervention. All side branches were patent at 1 month. The Kaplan-Meier survival rate at 6 months was 94.7%.

CONCLUSIONS: Total endovascular repair of distal zone 2 arch aortic aneurysms can be achieved with a novel branched arch endograft. Future studies will evaluate the feasibility of this approach for aneurysms encompassing the brachiocephalic trunk and left carotid artery.