COVID-19: coronavirus disease 2019; CRP: C-Reactive Protein; CVT: Cerebral Venous Thrombosis; ICA: Internal Carotid Artery; LVO: Large Vessel Occlusion; MT: mechanical thrombectomy; NIHSS: National Institute of Health Stroke Scale; PCOM: Posterior Cerebral Communicating Artery; PICA: Posterior Inferior Cerebellar Artery; TICI: thrombolysis in cerebral infarction.