Paraplegia secondary to Spinal Cord Ischemia identified within 30 days following the index endovascular procedure combined with Spinal Cord Ischemia scale grade = 3 at the one-month follow-up visit. Paraplegia will be assessed using the SVS spinal cord ischemia grading system

Paraparesis secondary to Spinal Cord Ischemia identified within 30 days following the index endovascular procedure, combined with Spinal Cord Ischemia scale grade = 2 at the one-month follow-up visit. Paraparesis will be assessed using the SVS spinal cord ischemia grading system.

New onset of sustained renal failure identified within 30 days following the index endovascular procedure, combined with requiring dialysis at the 1-Month follow-up visit.

Rupture in the treated segment of the vessel (e.g., aorta or branch) verified with direct observation or CT / CTA scan.

No flow or contrast detected through the implanted aortic component or endovascular branch component confirmed with imaging and/or direct observation.

Perfusion of a treated lesion via:

• Type I endoleak is defined as a sealing failure at one of the attachment zones of the graft to the vessel wall, whereby arterial flow perfuses the treated lesion via a perigraft channel:

  • Type Ia: Proximal aortic attachment zone
  • Type Ib: Distal aortic attachment zone
  • Type Ic: Distal attachment zone for branch component.

• Type II: Retrograde flow from native aortic branch arteries.

• Type III endoleak: Component disconnection or fabric disruption resulting in arterial flow into the perigraft space:

  • Type IIIa: Attachment of aortic components (aortic-aortic)
  • Type IIIb: Fabric tear or disruption
  • Type IIIc: Attachment of aortic component-side-branch or side-branch-side-branch.

• Type IV: Late endoleak due to flow through porous fabric.

• Type V/Endotension: Aneurysm sac enlargement > 5 mm with no imaging evidence of an endoleak.

• Indeterminate: Endoleak is identified, but source cannot be ascertained.

Additional surgical or interventional procedure related to the treated disease / index lesion, the study device, or to the treatment / procedure.

This may include surgical or interventional treatment for endoleaks, disease progression, procedures on the branch to improve or restore patency, spinal drains for Spinal Cord Injury (SCI) management, or conversion to open surgery.

Events will not include access site(s) complications, interventions to address issues related to non-treated area of the index lesion, such as bare stent implantation to address bowel ischemia associated with aortic dissection.

Stroke is the acute onset of symptoms consistent with focal or multifocal central nervous system (CNS) injury caused by vascular blockage resulting in ischemia or vascular rupture resulting in hemorrhage, that:

• Persists for ≥ 24 hours or until death -OR-
• Symptoms lasting < 24 hours, with pathology or neuroimaging confirmation of CNS infarction.

Disabling stroke will be determined based on mRS ≥ 2 with an increase from baseline of at least one grade due to neurological deficits at no more than 120 days following the suspected stroke event.

Transient focal neurological signs or symptoms (lasting < 24 h) presumed to be due to focal brain ischemia but without evidence of acute infarction by neuroimaging or pathology (or in the absence of imaging).

Paraplegia secondary to Spinal Cord Ischemia identified within 30 days following the index endovascular procedure. Paraplegia will be assessed using the SVS spinal cord ischemia grading system.

Paraparesis secondary to Spinal Cord Ischemia identified within 30 days following the index endovascular procedure. Paraparesis will be assessed using the SVS spinal cord ischemia grading system.

Device-related ischemic events in tissues distal to the device implantation site resulting in bypass, open surgical or transcatheter intervention, limb amputation, or leading to death.

Elevated CK-MB (≥ 10x ULN) measured within 48 hours following the surgical revascularization or index endovascular procedure or need for urgent or emergent PCI/CABG within 30-days following the surgical revascularization or index endovascular procedure as confirmed at the 1-Month follow-up visit.

Irreversible laryngeal nerve injury or phrenic nerve injury requiring unplanned surgery or intervention within 30-days following the surgical revascularization or index endovascular procedure as confirmed at the 1-Month follow-up visit.

Fistula detected between the aorta and any adjacent structure associated with the area treated with the endovascular stent graft system verified with direct observation or CT scan.

Clinically reported, device-related ischemia (Serious Adverse Event) not evident at the time of the index procedure with CTA-verified branch vessel compromise (i.e., malperfusion).

An increase in maximum vessel (e.g., aorta or treated branch) diameter of > 5 mm in the treated region as compared to baseline using orthogonal (i.e., perpendicular to the centerline) measurements on CT / CTA scans

Longitudinal movement of all or part of the device for a distance ≥ 10 mm, as confirmed by CTA scan, relative to anatomical landmarks and device positioning at the first post-operative CTA scan.

A new arterial tear that was not present at the time of initial presentation caused either by a stent graft, natural disease progression or iatrogenic injury during the endovascular procedure. This can include the propagation, or extension, of a previous dissection.

Defined as any of the following:

• Wire fractures
• Stent kinking: Narrowing of the stent graft associated with demonstrable angulation in any of the stent components, with demonstrable flow
• Disruption / tears in the graft component of the stent graft
• Stent compression or invagination: Transient or permanent stent graft collapse following complete device deployment, resulting in an overall reduction in the vessel luminal diameter

Status of the false lumen both within and outside of the segment of the aorta initially treated with an endovascular stent graft:

• Patent: Flow present throughout the entire aortic false lumen (absence of thrombus) on arterial-phase or delayed contrast-enhanced imaging.
• Partial thrombosis: Thrombus or clot within the aortic false lumen but with a residual patent flow channel on arterial-phase or delayed contrast-enhanced imaging.
• Complete thrombosis: Complete thrombosis of the aortic false lumen on arterial- and delayed-phase imaging.

Flow into the false lumen via:

• Type IA entry flow: Flow between the proximal endograft and aortic wall allowing systemic pressure antegrade flow into the primary entry tear and proximal false lumen.
• Type IB entry flow: Distal entry tear adjacent to endograft due to septal fenestration or a new intimal tear at the distal aspect of the stent graft (dSINE) allowing systemic pressure direct flow into the false lumen.
• Type II entry flow: Retrograde entry flow through arch vessel branches (innominate, carotid, subclavian) or thoracic bronchial and intercostal arteries into the false lumen.
• Type R entry flow: Antegrade entry flow from the true lumen into the false lumen through distal branch fenestrations (uncovered intercostal arteries, visceral or renal arteries, lumbar arteries, iliac branches) or septal fenestrations (excluding SINE).