LAUSR

INTRODUCTION The in situ fenestration (ISF) technique consists of maintaining the patency of the aortic branch after the endoprosthesis is already in place as a viable, effective, and fast-performing alternative to revascularize the aortic arch arteries. OBJECTIVE To report the experience with a series of cases of endovascular treatment of Acute Aortic Syndromes involving the aortic arch, using the ISF technique in a specialized center. METHODS We analyzed data collected from patients treated with ISF during TEVAR for Acute Aortic Syndromes involving the aortic arch from June 2020 to January 2022, assessing perioperative outcomes, including immediate and late success rates, complications, morbidity and mortality, and short and medium term aortic branch patency. RESULTS Of the 11 patients eligible for the ISF procedure, 9 were successful, with a technical success rate of 81%. No patient had a type 1A endoleak related to fenestration. There was complete thrombosis of the false lumen in the thoracic aorta in 77% cases. No death was related to the fenestration technique. CONCLUSION ISF as feasible and with a high rate of technical success and good results in the short and medium term. Prospective studies with long-term clinical follow-up are still needed to fully assess the durability of these unreinforced fenestrations.