Conventional TEVAR Versus FABULOUS RCT

Inclusion Criteria: * Males aged 18 years or older, or non-pregnant females * Diagnosed with high-risk Type B aortic dissection with a narrow true lumen (defined as the minimum true lumen diameter being less than 30% of the total vessel diameter) and/or poor radiographic or clinical visceral perfusion (including abnormal blood supply to the liver, kidneys, mesentery, or lower limb ischemia) * Deemed suitable for endovascular treatment according to the investigator's judgment * Able to understand the purpose of the trial, willing to participate voluntarily and sign the informed consent form, and committed to follow-up visits. Exclusion Criteria: * • Subjects with hemodynamic instability or ruptured aortic dissection * Subjects who, due to various anatomical factors, are unable to undergo TEVAR alone * Subjects with connective tissue diseases, such as Marfan syndrome * Subjects in poor general condition, unable to tolerate general anesthesia * Subjects allergic to contrast agents, nitinol stent materials, or other stent components * Subjects with a life expectancy of less than 12 months * Subjects with a history of myocardial infarction or unstable angina within the past 3 months * Subjects with a history of TIA or cerebral infarction within the past 3 months * Subjects with creatinine levels exceeding 2.5 times the upper normal limit or those currently on dialysis * Subjects with severe conditions such as liver failure