ShOrt neCK AAA RAndomized Trial - ESAR and FEVAR: SOCRATES

Inclusion Criteria:

• Subject is >18 years old

• Subject is scheduled for primary treatment of the abdominal aortic aneurysm with anon-aneurysmal infrarenal aortic sealing zone proximal to the aneurysm that issufficiently healthy for a proximal neck length that is at least 4mm and not morethan15 mm and has a circumferential minimum sealing zone length of 8 mm

• Subject is not a candidate for safe, effective and durable standard EVAR due tochallenging anatomical criteria as confirmed by the Core Lab screening

• Subject is able and willing to comply with the protocol and to adhere to thefollow-up requirements.

• Subject has provided written informed consent

CT Angiographic Inclusion Criteria

• Subject meets the other anatomical requirements according to the locally applicableEndurant II/IIs stent graft system, Heli-FX EndoAnchor system, Terumo FenestratedAnaconda (available in EU only) and/or Cook Zenith Fenestrated Graft Instructionsfor Use

• Proximal neck length of the aorta within 4-15mm and a minimum circumferentialsealing zone of 8mm

• Aortic neck diameter from 19 to 31mm

• Infrarenal neck angulation ≤45°

Exclusion Criteria:

• Subject is participating in a concurrent study which may confound study results

• Subject has a life expectancy <2 year

• Subject is female of childbearing potential in whom pregnancy cannot be excluded

• Subject with eGFR <30 mL/min/m2 (KDOQI classification - exclude class IV and above)and or on dialysis

• Subject with a MI or CVA within 3 months prior to index procedure

• Subject with known Connective Tissue Disease

• Subject has a known hypersensitivity or contraindication to anticoagulants,antiplatelets, or contrast media, which is not amenable to post-treatment

• Subject who has undergone prior endovascular or open surgical treatment forabdominal aortic aneurysm

• Subject requires emergent aneurysm treatment, for example, trauma or rupture

• Subject has a known hypersensitivity or allergies to study device implant material

• Subject has an aneurysm that is:

• Suprarenal, pararenal, or thoracoabdominal

• Mycotic

• Inflammatory

• Pseudoaneurysm

• Subject is presenting with thrombus or calcification of the proximal aneurysm neck:circumferential >50%

• Pre-op stenosis of the renal arteries > 50%

• Subject has active infection or history of COVID-19. History of COVID-19 is definedas availability of positive COVID-19 test with sequelae or hospitalization fortreatment of COVID-19.