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  • Title: Endovascular Thrombectomy Outcomes with and without Intravenous Thrombolysis for Large Ischemic Cores Identified with CT or MRI.
    Author: Derraz I, Moulin S, Gory B, Kyheng M, Arquizan C, Costalat V, Lapergue B, ETIS InvestigatorsFrom the Departments of Neuroradiology (I.D., V.C.) and Neurology (C.A.), Hôpital Gui de Chauliac, Montpellier University Medical Center, 80 Avenue Augustin Fliche, Montpellier 34295, France; Department of Neurology, Reims University Hospital Center, Reims, France (S.M.); Department of Neuroradiology, Nancy University Hospital Center, Nancy, France (B.G.); Department of Biostatistics, University of Lille, Lille University Hospital Center, EA 2694-Public Health: Epidemiology and Quality of Care, Lille, France (M.K.); and Department of Neurology, University of Versailles Saint-Quentin-en-Yvelines, Foch Hospital, Suresnes, France (B.L.)..
    Journal: Radiology; 2023 Oct; 309(1):e230440. PubMed ID: 37847131.
    Abstract:
    Background Whether intravenous thrombolysis (IVT) prior to endovascular thrombectomy (EVT) provides additional benefits in patients with acute ischemic stroke (AIS) and a large infarct core (LIC) remains unclear. Purpose To examine whether treatment with IVT before EVT is beneficial in patients with LIC identified with CT or MRI (Alberta Stroke Program Early CT score 0-5). Materials and Methods This retrospective study included consecutive adult patients diagnosed with AIS due to large vessel occlusion (LVO) and LIC treated with EVT who were enrolled in the ETIS (Endovascular Treatment in Ischemic Stroke) Registry in France between January 2015 and January 2022. The primary outcome measure was a favorable outcome (modified Rankin Scale [mRS] score 0-3) at 90 days. Secondary outcomes included functional independence (mRS score 0-2) at 90 days, improvement in degree of disability (ordinal shift in mRS score toward a better outcome) at 90 days, early neurologic improvement at 24 hours, and successful reperfusion (modified Thrombolysis in Cerebral Infarction score of 2b or higher). Safety outcomes included symptomatic intracerebral hemorrhage within 24 hours and mortality at 90 days. Inverse probability of treatment weighting (IPTW)-adjusted analysis was used to assess the treatment effect of IVT adjusted for baseline variables. Results Of 1408 patients (mean age, 68.3 years ± 15.4 [SD]; 789 men), 654 (46.4%) were treated with IVT prior to EVT. In the IPTW-adjusted data set, IVT plus EVT was associated with a higher rate of favorable outcome at 90 days (odds ratio [OR], 1.24 [95% CI: 1.05, 1.46]; P = .01), functional independence at 90 days (OR, 1.47 [95% CI: 1.22, 1.77]; P < .001), improvement in degree of disability at 90 days (common OR, 1.30 [95% CI: 1.13, 1.49]; P < .001), early neurologic improvement (OR, 1.26 [95% CI: 1.07, 1.49]; P = .005), and successful reperfusion (OR, 1.43 [95% CI: 1.14, 1.79]; P = .002) than EVT alone. Rates of brain hemorrhage within 24 hours and mortality at 90 days were similar between groups. Conclusion In patients with AIS due to LVO with LIC identified with CT or MRI, treatment with IVT before EVT appeared to provide a clinical benefit over EVT alone. Clinical trial registration no. NCT03776877 © RSNA, 2023 Supplemental material is available for this article. See also the editorial by Kallmes and Rabinstein in this issue.
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