 The STARZ-TX2 trial Study of Thoracic Aortic Aneurysm Repair with the Zenith TX2R TAA Endovascular Graft is a clinical trial approved by the FDA to study the safety and effectiveness of the Zenith TX2R TAA Endovascular Graft in the treatment of thoracic aortic aneurysms ulcers. Instead of making a large incision in the chest, the physician makes a small incision near the groin to insert and guide the graft into place in the aorta, relieving pressure on the aneurysm and helping to reduce the risk of rupture. 