Study of the RelayPro Thoracic Stent-Graft in Subjects With an Acute, Complicated Type B Aortic Dissection

This clinical trial is a prospective, multicenter, non-blinded, non-randomized study designed to assess the RelayPro thoracic endografts in the treatment of acute, complicated type B aortic dissection. The primary endpoint will measure all-cause mortality at 30 days post-procedure. Subjects will be enrolled on a first come, first serve basis; however, no single investigational site may enroll more than 20% of the proposed sample size of up to 80 subjects. A subject is considered enrolled when arterial access is gained and an attempt is made to introduce the RelayPro Thoracic Stent-Graft. Enrollment is expected to begin in mid-2016 and complete by the end of 2020. All subjects enrolled, as defined above, will be included in the patient population for the primary safety analyses. All subjects implanted with the RelayPro Thoracic Stent-Graft will be included in the patient population for the primary effectiveness analyses.