Thoracic Endovascular Aortic Repair with Supra-Aortic Trunk Revascularization is Associated with Increased Risk of Periprocedural Ischemic Stroke.

BACKGROUND

Ischemic stroke is a devastating complication of thoracic endovascular aortic repair (TEVAR). This risk may be higher in more proximal aneurysms that require arch manipulation. The purpose of this study is to (1) describe 30-day stroke and death rates in patients undergoing TEVAR, (2) compare stroke rates in patients undergoing TEVAR for arch versus descending aneurysm pathology, and (3) identify predictive factors associated with stroke after TEVAR.

METHODS

The Vascular Quality Initiative registry was queried (2015-2021) for TEVAR procedures performed for degenerative aneurysms. Our primary outcomes were any stroke or death at 30 days. Patient-, procedure-, and hospital-level predictors of stroke were assessed using multivariable Poisson regression.

RESULTS

Among 3,072 patients with degenerative aneurysms (197 [6.4%] arch versus 2,875 [93.6%] descending) treated with elective TEVAR, the median age was 73 years (interquartile range 67-79) and 54.8% were male. Within the arch aneurysm group, there were 27.4% zone 0, 22.8% zone 1, and 49.8% zone 2 interventions. Overall 30-day stroke and death rates were 3.2% and 3.8%. The distribution of stroke events was bilateral (52.9%), left carotid (20.7%), left vertebrobasilar (11.5%), right carotid (9.2%), and right vertebrobasilar (5.7%). Although mortality was similar between groups, the rate of ischemic stroke was higher for patients undergoing TEVAR for arch aneurysm versus descending aneurysms (7.1% arch versus 2.9% descending, P = 0.001). Factors that were associated with ischemic stroke after TEVAR included age (>79 years, relative risk [RR] 1.79, 95% confidence interval [CI] 1.08-2.98 vs. <79 years), dependent functional status (RR 1.73, 95% CI 1.07-2.78), procedural time (RR 1.25, 95% CI 1.15-1.36), and endovascular intervention for supra-aortic trunk revascularization (RR 2.66, 95% CI 1.06-6.70 versus no intervention).

CONCLUSIONS

Ischemic stroke risk after TEVAR was increased for arch aneurysms compared to descending aneurysms. More proximal zone coverage and endovascular interventions on the supra-aortic trunks were associated with increasing risk for stroke. Adequate preparation for stroke prevention is necessary prior to TEVAR with supra-aortic trunk revascularization.