Akinetic MutismInfarction, Anterior Cerebral ArteryAnterior Cerebral ArteryCerebral InfarctionCerebral ArteriesInfarction, Middle Cerebral ArteryCerebral AngiographyMiddle Cerebral ArteryTomography, X-Ray ComputedIntracranial AneurysmCerebrovascular CirculationCircle of WillisMagnetic Resonance ImagingBrain IschemiaIntracranial Embolism and ThrombosisCerebral Arterial DiseasesSubarachnoid HemorrhageIschemic Attack, TransientAneurysm, RupturedMagnetic Resonance AngiographyBrainCerebrovascular DisordersCarotid Artery, InternalArterial Occlusive DiseasesBrain EdemaStrokeUltrasonography, Doppler, TranscranialHemiplegiaBasilar ArteryCerebral HemorrhageBlood Flow VelocityCerebral RevascularizationArteriesEchoencephalographyMyocardial InfarctionVasospasm, IntracranialCarotid ArteriesTreatment OutcomeAngiography, Digital SubtractionInfarctionTomography, Emission-Computed, Single-PhotonIntracranial Arteriovenous MalformationsNeurosurgical ProceduresAcute DiseaseVertebral ArteryPosterior Cerebral ArteryEmbolization, TherapeuticBrain Hemorrhage, TraumaticDominance, CerebralCraniotomyIntracranial ArteriosclerosisTissue Plasminogen ActivatorMoyamoya DiseasePredictive Value of TestsAneurysm, Dissecting