Middle Cerebral ArteryInfarction, Middle Cerebral ArteryStrokeCerebral ArteriesBrain IschemiaCerebral InfarctionCerebrovascular CirculationFibrinolytic AgentsTissue Plasminogen ActivatorCerebral Arterial DiseasesThrombolytic TherapyIschemic Attack, TransientAcute DiseaseCerebral AngiographyUltrasonography, Doppler, TranscranialCerebrovascular DisordersCerebral HemorrhageReperfusionBrainArterial Occlusive DiseasesTime FactorsTomography, X-Ray ComputedTreatment OutcomeNeuroprotective AgentsBrain EdemaBrain InfarctionIntracranial ThrombosisCerebral RevascularizationBlood Flow VelocityAnterior Cerebral ArteryPosterior Cerebral ArteryArteriesMyocardial InfarctionIntracranial Embolism and ThrombosisMagnetic Resonance ImagingIntracranial EmbolismMagnetic Resonance AngiographyProspective StudiesIntracranial HemorrhagesInfarctionMechanical ThrombolysisCarotid Artery, InternalBasilar ArteryRisk FactorsDisease Models, AnimalInfarction, Anterior Cerebral ArteryThrombectomyPredictive Value of TestsInjections, Intra-ArterialRetrospective StudiesSeverity of Illness IndexIntracranial AneurysmCarotid ArteriesNeurologic ExaminationRecovery of FunctionRats, Sprague-DawleyIntracranial ArteriosclerosisDiffusion Magnetic Resonance ImagingBlood PressureSubarachnoid HemorrhageReperfusion InjuryCarotid Artery DiseasesInjections, IntravenousFollow-Up StudiesCarotid StenosisCarotid Artery ThrombosisTemporal ArteriesRats, WistarInfusions, Intra-ArterialCerebral CortexInfarction, Posterior Cerebral ArteryBlood-Brain BarrierConstrictionCollateral CirculationUmbilical ArteriesRegional Blood FlowAngiography, Digital SubtractionIntracranial Arterial DiseasesCohort StudiesPrognosisInfusions, IntravenousVertebral ArteryAneurysm, RupturedPulmonary ArteryAnticoagulantsRecurrencePlatelet Aggregation InhibitorsCircle of WillisUltrasonography, DopplerEmbolectomyCerebral VeinsLaser-Doppler FlowmetrySensitivity and SpecificityPia MaterStentsVasoconstrictionHemiplegiaPerfusion ImagingEchoencephalographyCase-Control Studies