Patients undergoing fenestrated endovascular aortic repair with BeFlared FEVAR Stent Graft System©

Patients undergoing fenestrated aortic repair with GORE® VIABAHN® VBX Balloon Expandable Endoprosthesis

Preinterventional randomization of patients to one of two arms - fenestrated endovascular aortic repair with BeFlared FEVAR Stent Graft System© or GORE® VIABAHN® VBX Balloon Expandable Endoprosthesis.

Cumulative device time (measured in minutes) is defined as time between introduction of bridging stent graft (BSG) system into sheath and successful removal of deflated BSG flaring balloon for each of target vessels.

TV instability at early, short-term and midterm follow up - defined as any death or aneurysm rupture event related to TV complication (e.g. TV endoleak or rupture) or any secondary intervention indicated to treat a TV related complication, including TV endoleak, disconnection, kinking, stenosis, occlusion, or rupture.

Early follow-up is defined as radiological and clinical follow-up of the patients within the first 30 postoperative days or withing the hospital stay if longer than 30 days. Short-term follow-up encompass follow-up between 30 days and 6 months. Midterm follow-up refer to follow-up that occur within 6 months to 5 years after FEVAR procedure.

Intraoperative target vessel (TV) technical success is defined as successful TV catheterization and placement of bridging stent graft (BSG) with restoration and maintenance of flow in all intended TVs.

Procedural metrics (operation time [minutes], dose of area product [Gy cm2], fluoroscopy time [minutes], dose of contrast agent applied [mL], intraoperative blood loss [mL]), duration of intensive care unit stay, TV patency, TV related endoleak formation, secondary TV related reinterventions as well as major adverse events (all-cause mortality, myocardial infarction, renal events, mesenteric events, respiratory events) at early, short-term and midterm postoperative outcome in patients undergoing FEVAR procedure with BeFlared or VBX bridging device will comprise explorative objectives (parameters) of this study.