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Background: Complicated type B aortic dissections require surgery or thoracic endovascular aortic repair(TEVAR). In this study, we sought to explore the early and mid-term clinical efficacy of TEVAR treatmentfor Stanford complicated type B aortic dissection.Methods: From January 2012 to October 2017, the medical records and the aortic imaging data of 172consecutive patients treated by TEVAR were retrospectively reviewed for statistical analysis. Aorticremodeling was evaluated based on the preoperative and one-year postoperative followed-up aortic CTAscan results. We analysed the diameters of the total aortic lumens, True and False lumens diameter and thethrombosis status at different five levels along the descending aorta.Results: The primary technical success rate was 97%, and the clinical success rate was 94.8%. At 1-year ofaortic CTA follow-up after TEVAR, the true lumen diameter at the stented descending thoracic aortaincreased significantly, the false lumen diameter significantly reduced. The remodeling process was stablewith mild changes of true lumen increase and false lumen reduction at the unstented distal part of thedescending thoracic and the abdominal aorta.Conclusion: This study confirmed that TEVAR treatment for complicated type B aortic dissectionhas a low mortality rate of mid-term follow-up outcomes. TEVAR stabilizes the size of the aorta andprecipitates in FL thrombosis. However, FL in the abdominal aorta still patented and must becarefully observed for further long-term events.

Mid-Term Clinical and Morphological Outcomes After Thoracic Endovascular Aortic Repair for Complicated Type B Aortic Dissection