Abstract
Aim: To evaluate the technical and clinical success of stent graft implantation in abdominal aortic aneurysm (AAA) with neck angulated more than 60 degrees. Methods: We retrospectively analyzed the outcomes of endovascular treatment of subrenal aortic aneurysm (EVAR) performed from 2013 to 2021 in patients with AAA neck angulation greater than 60 degrees.
The cohort consists of 27 patients with neck angulation of 65-95 degrees. Results: In all 27 cases the stent graft (SG) was correctly implanted by the same endovascular team.
Type I endoleak was present in 2 patients. In the first case, we managed the endoleak with proximal SG extension, in the second case, surgery was not indicated due to the patient's comorbidities.
During the follow-up period, we did not observe any aneurysm rupture or death related to the procedures. Follow-up sonographic examinations performed 6 months apart showed AAA sac shrinkage in 15 (55.5%) patients and 11 (40.7%) patients did not show progression of aneurysm sac diameter.
Conclusion: EVAR in necks angulated more than 60 degrees is technically possible and successful, however, only provided that the neck length of the aneurysm is sufficient to anchor the SG. Once one or more adverse factors are present simultaneously, the risk of proximal endoleak (type Ia) increases and the chance of successful and permanent exclusion of the aneurysm from the circulation decreases significantly.