Results of the French Multicentric Study of ANACONDA™ Fenestrated Endografts in the Treatment of Complex Aortic Pathologies (EFEFA Registry)

Background Most of the experience on fenestrated endovascular aneurysm repair involves the custom-made Zenith ® endograft (Cook). The fenestrated Anaconda ® endograft (Vascutek) was introduced with the potential advantages of complete repositioning and lack of stent material on the main aortic body for more versatility. However, few data are available. Our objective was to assess its mid-term results in the treatment of complex aortic aneurysms. Methods Consecutive patients treated with the custom-made fenestrated Anaconda endograft in France and the Principality of Monaco, from December 2010 to October 2015, were included. Results Eighty-six patients were included over 16 centers (82 men, mean age 73.4 ± 8.1 years, 16 (18.6%) symptomatic aneurysms). The repositioning system was used in 68 cases (79.1%). Two hundred ninety-two visceral/renal vessels were targeted, with a mean number of 3.4 ± 0.6 target vessels/patient and a successful reconstruction in 99.3% of the cases (290/292 vessels). Perioperative technical success was achieved in 86.0% (74/86 patients). In-hospital and 30-day mortality rates were 3.5% (3 patients) and 7.0% (6 patients), respectively. At 12 and 24 months, estimated overall survival rate was 88.3% and 85.2%, target vessel's patency rate was 97.2% and 96.3%, and freedom from aneurysm-related reintervention rate was 96.3% and 88.0%, respectively. At 24 months, there were 7 type II endoleaks (12.7%) and a significant reduction in aneurysm maximum transverse diameter in 70.4%. Five limb occlusions occurred at 1-year and 1 at 2-year follow-up (7.0%). Conclusions The fenestrated Anaconda stent-graft system offers acceptable technical success rates, mid-term efficacy, and durability with respect to aneurysm sac regression, target vessel patency, overall mortality, and reintervention rates. Long-term results are still awaited, until then, the rate of graft limb occlusion is of concern and should be further investigated, especially in case of particularly complex aortic anatomies.