Imaging Analysis Of Aortic Remodeling Of Chronic Stanford B Aortic Dissection After Endovascular Repair By Taper Type Stent-graft

Objective:Measure the aortic morphological parameters of true lumen and false lumen on pre/post-operative and follow-up images of chronic type B aortic dissections patients(TBAD), combining with clinical materials of follow-up, to determined the durability and effectiveness of thoracic endovascular aortic repair(TEVAR) by Taper type Stent-graft on chronic TBAD and explore the aortic remodeling and morphological change after TEVAR.Materials and Methods:Collect clinical data and CTA images of 27 chronic TBAD patients who received TEVAR by Taper type Stent-graft, calibrate thrombosis area of false lumen(FL), short diameter, long diameter and area of true lumen(TL) and FL in levels of aortic isthmus, mid descending aorta, distal descending aorta, celiac trunk axis, renal artery and distal abdominal aorta. Calculate TL compression index(Ci), effective expanded area(EEA) and effective expanded ratio(EER) and perform statistical analysis combining with 48 weeks follow-up data.Results:Short diameters of TL were increased 2 weeks after operation in isthmus and distal descending aorta levels (P<0.01); Short diameters of FL were decreased 2 weeks after operation in isthmus and mid descending aorta levels (P<0.01); Area of TL and Ci value were increased in all levels while area of FL decreased in descending aorta(P<0.05); EER of renal artery level were positive related to Creatinine decreasing 3 weeks after operation under Pearson regression analysis(R2=0.7812, P<0.05);Conclusion:Aortic morphological remodeling plays a important role in prognosis of chronic TBAD after TEVAR treatment, analysis of area provides more accurate and effective information in the process. Aortic Remodeling of Chronic Stanford B Aortic Dissection after Endovascular Repair by Taper type Stent-graft is remarkable...