The goal of this clinical trial is to determine whether an upfront invasive strategy of TEVAR plus medical therapy reduces the occurrence of a composite endpoint of all-cause death or major aortic complications compared to an upfront conservative strategy of medical therapy with surveillance for deterioration in patients with uncomplicated type B aortic dissection.

The investigational Vascular Covered Stent is a self-expanding, low profile, polytetrafluoroethylene encapsulated nitinol implant. It is deployed from a delivery system that provides controlled stent release.