A Non-Randomized, Prospective or Retrospective, Open-Label, Multi-Center, Observational Clinical Study With Two Arms to Further Evaluate Safety and Performance of the NEXUS® Aortic Arch Stent Graft System and the Custom-Made NEXUS Multibranch™ Aortic Arch Stent Graft System

The goal of this observational study is to collect clinical information on how safe, and how well the NEXUS Aortic Arch Stent Graft System and the Custom-Made NEXUS DUO™ Aortic Arch Stent Graft System work for the treatment of aortic aneurysms, in the standard-of-care setting.

The main question[s] it aims to answer are:

• Early mortality
• Safety outcomes throughout the study
• Device failure throughout the study
• Procedural and hospitalisation information Participants will be treated per institutional standard of care Follow-up information will be collected through to five years.