Impact of Number of Vessels Targeted on Outcomes of Fenestrated-Branched Endovascular Repair for Complex Abdominal Aortic Aneurysms

The aim of this study was to investigate the impact of number of vessels targeted by fenestrations or branches on early outcomes of fenestrated-branched endovascular aortic repair (F-BEVAR) for complex abdominal aortic aneurysms (cAAAs). The clinical data of 260 patients (209 men; mean, 74 ± 7 years) treated for cAAAs in four academic centers using fenestrated-branched stent grafts with one to five fenestrations or branches were entered into prospectively maintained databases (2010–2015). Data were analyzed in patients treated with ≤2-vessel (group 1, n = 124), 3-vessel (group 2, n = 80), or ≥4 fenestrations or directional branches (group 3, n = 56). For group definition, only vessels incorporated by fenestrations or directional branches were accounted. End points were technical success, procedural variables, 30-day mortality, and major adverse events (MAEs). A total of 830 vessels (mean, 3.19 ± 0.8 vessels/patient) were targeted by fenestrations (n = 672), scallops (n = 136), or branches (n = 22). Two-vessel designs were used more often in the early experience (64%), whereas ≥3-vessel design (groups 2 and 3) was preferred in the late experience (68%, P