Neurological complications after thoracic endovascular aortic repair. Does the left subclavian artery coverage without revascularization increase the risk of neurological complications in patients after thoracic endovascular aortic repair?

INTRODUCTION: One of the most severe complications after TEVAR is ischemic stroke and spinal cord ischemia (SCI) resulting in severe disability. These complications can be fatal up to 30% of cases, so it is very important to define risk factors associated with the occurrence of such events. The aim of this study was to define the causes and risk factors associated with the occurrence of neurological complications in patients after TEVAR. MATERIALS AND METHODS: We performed a retrospective analysis of 51 patients undergoing TEVAR in the Department of Vascular Surgery of Military Teaching Hospital in Wroclaw between 2014 and 2017. In 18 patients LSA coverage was managed without revascularization (35.29%), and in 33 patients LSA remained uncovered (64.71%). RESULTS: We did not find any statistically significant difference in the incidence of stroke and spinal cord ischemia in patients with covered and uncovered LSA (stroke p = 0.37, SCI p = 0.58). In the group of patients with covered and uncovered LSA, we did not find any significant differences in the incidence of additional comorbidities such as obesity, ischemic heart disease, hypertension or previous stroke. CONCLUSIONS: There is no difference in stroke and SCI occurrence between patients with covered and uncovered LSA. Although there are many studies analysing the risk of such complications, there is no specific consensus regarding the treatment of LSA coverage. Randomised clinical trials on a large group of patients are still needed.