Middle Cerebral ArteryInfarction, Middle Cerebral ArteryCerebral ArteriesStrokeCerebral InfarctionBrain IschemiaCerebrovascular CirculationCerebral Arterial DiseasesIschemic Attack, TransientUltrasonography, Doppler, TranscranialCerebral AngiographyCerebrovascular DisordersBrainArterial Occlusive DiseasesAnterior Cerebral ArteryReperfusionBlood Flow VelocityArteriesTime FactorsIntracranial Embolism and ThrombosisMyocardial InfarctionPosterior Cerebral ArteryCerebral HemorrhageBrain EdemaTomography, X-Ray ComputedInfarctionTissue Plasminogen ActivatorBrain InfarctionNeuroprotective AgentsFibrinolytic AgentsThrombolytic TherapyMagnetic Resonance AngiographyBasilar ArteryAcute DiseaseDisease Models, AnimalTreatment OutcomeMagnetic Resonance ImagingCarotid Artery, InternalIntracranial AneurysmProspective StudiesIntracranial EmbolismRats, Sprague-DawleyCarotid ArteriesIntracranial ThrombosisCerebral RevascularizationNeurologic ExaminationInfarction, Anterior Cerebral ArterySubarachnoid HemorrhageRecovery of FunctionTemporal ArteriesPredictive Value of TestsRisk FactorsBlood PressureRats, WistarReperfusion InjuryConstrictionCarotid Artery ThrombosisUmbilical ArteriesCerebral CortexSeverity of Illness IndexCarotid Artery DiseasesAneurysm, RupturedHemiplegiaDiffusion Magnetic Resonance ImagingPulmonary ArteryCircle of WillisRetrospective StudiesVertebral ArteryUltrasonography, DopplerCarotid StenosisIntracranial ArteriosclerosisRegional Blood FlowFollow-Up StudiesInjections, Intra-ArterialCerebral VeinsIntracranial HemorrhagesLaser-Doppler FlowmetryPia MaterVasoconstrictionBlood-Brain BarrierCerebral PalsyVasodilationCollateral CirculationCatsInfarction, Posterior Cerebral ArteryEchoencephalographyHemodynamicsAngiography, Digital SubtractionCarotid Artery, ExternalParesisFemoral ArteryPrognosisRenal ArteryMesenteric ArteriesInjections, IntravenousPulsatile FlowRats, Inbred SHRMoyamoya DiseaseCraniotomyCarbon Dioxide