Midterm outcome analysis of endovascular treatment for chronic type B aortic dissection

Objective To assess midterm results of endovascular stent-graft placement for chronic type B aortic dissection (cTBD) and evaluate the safety and efficacy of TEVAR in cTBD patients. Methods Clinical data about 25 patients who were treated with stent-graft implantation for cTBD in our hospital from February 2011 to December 2013 were retrospectively analyzed. The clinical outcomes and arterial remodeling of patients were evaluated based on the follow-up and image data. Results The success rate was 100%, and no patients died within 30 days. Median follow-up time was 28.9 (26.4-35.2) months. The cumulative survival rate of 1 year and 3 years were 100% and 95.2%, respectively (95% CI:86.1%-100%). The aortic remodeling was good in the stents recovered segment, while the cumulative aortic enlargement incidence of aortic segment distal to stent-graft was 30%-45%. Conclusion TEVAR treatment for cTBD shows high technical success rate and high survival rate of early and middle age, but aortic remodeling of aortic segment distal to stent-graft performs bad. cTBD patients treated with TEVAR require close imaging follow-up.