Abstract TP17: Outcomes in Octogenarians Undergoing Mechanical Thrombectomy for Acute Ischemic Stroke: A Single Center Experience

Abstract

Background: Mechanical thrombectomy (MT) for acute ischemic stroke (AIS) in the elderly presents a unique set of challenges and opportunities. Most existing studies include patients up to the age of 90 with stricter criteria of inclusion for patients ≥ 80 years of age. The following study compares the outcomes in octogenarians compared to younger patients in a single center. Methods: We conducted a retrospective chart review of patients who were ≥ 80yo who underwent MT from March 2016 to July 2019. Data on age, recanalization score measured by Thrombolysis in Cerebral Infarction (TICI) score and clinical outcomes were compared to 126 patients < 80 years of age treated during the same time period. Clinical outcomes were classified based on modified Rankin score (mRS) at discharge. Poor outcomes were defined as mRS 4-6. Good recanalization was defined as TICI score 2b or 3. Results: Eighty-three patients with a median age of 86±4.34yo were compared to 126 patients with median age of 63±12.48yo (p<0.0001). Good recanalization was achieved in 74% of patients ≥80yo compared to 84% in patients <80yo (p= 0.06). Poor outcomes were reported in 74.6% of patients ≥80yo compared to 47.0% in patients <80yo (p<0.0001). All-cause mortality was 28.9% in the ≥80yo vs 12.9% in the < 80yo (p=0.006). Conclusion: In our cohort, the clinical outcomes among octogenarians receiving MT were worse than in younger patients despite no difference in recanalization. Various factors may be responsible including overall health status, comorbid conditions and neuroplasticity. Further prospective multicentral studies are needed to better understand the benefit of MT in octogenarians.