RecruitingDevice studyEndovascular Exclusion of Thoracoabdominal and/or Paravisceral Abdominal Aortic AneurysmThis is a study to assess the safety and effectiveness of endovascular treatment of thoracoabdominal (TAAA) and paravisceral abdominal (PVAAA) aortic aneurysms. The investigational operation involves placing a stent-graft over the aortic aneurysm.