Results of the in situ fenestration technique for preservation of the Left subclavian artery in the endovascular repair of acute aortic syndromes in a reference center.

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.