Abstract 8566: Regression Pattern of Aortic Lesion after Endovascular Stent-graft Implantation in Patients with Complicated Acute Aortic Syndrome
Background: Endovascular aortic repair (EVAR) using stent-graft has been appropriate and valid treatment in selected patients with complicated or progressive acute aortic syndrome (AAS). However, there is few data about regression or change of aortic lesions after EVAR.
Methods and Results: From January 2007 to May 2010, 29 patients who underwent EVAR due to complicated or progressive AAS were enrolled. The underlying aortic syndrome included an intramural hematoma (IMH, n = 15), penetrating atherosclerotic ulcer in aortic aneurysm (PAU in AA, n = 9) and Stanford type B aortic dissection (AD, n = 5). We analyzed the changes in maximal diameter of aorta, minimal diameter of inner lumen and maximal thickness or lumen size of hematoma, aneurysm and dissection before and after EVAR using 64-multidetector computed tomography (MDCT). Then, we defined > 75% of shrinkage in maximal thickness or size of pathologic lesions after EVAR as complete, 25-75% as partial and < 25% as no regression. The follow-up 64-MDCT data was obtained from 12-month after EVAR (mean 10.8 ± 1.1 months), and the rate of follow-up 64-MDCT was 89.7%. Lesion characteristics and changes after EVAR were described in Table.
Conclusion: EVAR in complicated or progressive AAS lesions promotes the regression of the main aortic disease through stabilizing further evolution of underlying pathology and maintaining inner luminal space. Also, EVAR achieves the high rate of complete regression in patients with IMH.
- © 2011 by American Heart Association, Inc.