• Seby John, Praveen Kesav, Victoria Ann Mifsud, Bartlomiej Piechowski-Jozwiak, Jamil Dibu, Ahmad Bayrlee, Hussam Elkambergy, Florian Roser, Mohamed Samy Elhammady, Khalil Zahra, and Syed Irteza Hussain.
• Department of Neurology (S.J., P.K., V.A.M., B.P.-J., S.I.H.), Neurological Institute johns5@clevelandclinicabudhabi.ae.
• AJNR Am J Neuroradiol. 2020 Dec 1; 41 (12): 2263-2268.

AbstractThe mechanisms and phenotype of ischemic stroke associated with coronavirus disease 2019 (COVID-19) remain uncertain. A retrospective study was conducted in patients with COVID-19 presenting with ischemic stroke from March 1 to May 25, 2020, and cases with large-vessel occlusion were identified. To provide baseline institutional stroke data within and outside the COVID-19 pandemic, all consecutive ischemic stroke and TIA admissions (COVID and non-COVID) to the hospital during a 10-week period from March 1 to May 10, 2020, were collected and compared with data from the same time period in 2019. Among 20 patients with COVID-19 and acute ischemic stroke, 15 (75%) had large-vessel occlusion. These patients were young (mean age, 46.5 years), male (93%), without major burden of traditional cardiovascular risk factors, and had a severe stroke presentation. Large-vessel occlusions were observed in multiple vessels (40%), uncommonly affected vessels, and atypical locations with a large thrombus burden. Systemic thrombosis separate from large-vessel occlusion was not uncommon (26%). At short-term follow-up, stroke etiology remained undetermined in 46% of patients and functional outcome was poor. The above findings raise the possibility of stroke related to mechanisms induced by the COVID-19 infection itself, including a hypercoagulable state and/or endothelial damage. In addition, they document the severe presentation and poor outcomes of large-vessel occlusion in COVID-19 ischemic stroke.© 2020 by American Journal of Neuroradiology.

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