Cerebral ArteriesMiddle Cerebral ArteryInfarction, Middle Cerebral ArteryArteriesCerebral InfarctionCerebrovascular CirculationPosterior Cerebral ArteryAnterior Cerebral ArteryBrain IschemiaCerebral AngiographyBasilar ArteryVena Cava, InferiorBrainCerebral Arterial DiseasesPulmonary ArteryCarotid ArteriesInferior ColliculiIschemic Attack, TransientArterial Occlusive DiseasesCerebral PalsyRenal ArteryMesenteric ArteriesCarotid Artery, InternalFemoral ArteryVertebral ArteryUltrasonography, Doppler, TranscranialIntracranial AneurysmBlood Flow VelocityInfarction, Anterior Cerebral ArteryMagnetic Resonance ImagingTomography, X-Ray ComputedIntracranial Embolism and ThrombosisSubarachnoid HemorrhageTemporal ArteriesCerebral HemorrhageBrain EdemaCerebral VeinsCircle of WillisCarotid Artery DiseasesInfarction, Posterior Cerebral ArteryVasoconstrictionTime FactorsMagnetic Resonance AngiographyStrokeIliac ArteryCoronary Artery BypassCerebrovascular DisordersCerebral RevascularizationRadial ArteryReperfusionDisease Models, AnimalRats, Sprague-DawleyMalaria, CerebralUmbilical ArteriesMesenteric Artery, InferiorNeuroprotective AgentsMammary ArteriesTreatment OutcomeAneurysm, RupturedMuscle, Smooth, VascularBlood PressureSubclavian ArteryCarotid Artery, CommonRegional Blood FlowVasodilationBrain InfarctionCarotid Artery, ExternalSplenic ArteryOphthalmic ArteryRats, WistarBrachial ArteryVasospasm, IntracranialCoronary VesselsHepatic ArteryCarotid StenosisMesenteric Artery, SuperiorPia MaterCeliac ArteryUltrasonography, DopplerConstrictionCarotid Artery ThrombosisAngiography, Digital SubtractionDominance, CerebralVasodilator AgentsCatsEndothelium, VascularEmbolization, TherapeuticHemodynamicsAngiographyDogsReperfusion InjuryMoyamoya DiseaseProspective StudiesFollow-Up StudiesOxygenConstriction, PathologicImage Processing, Computer-AssistedIntracranial ThrombosisLaser-Doppler FlowmetryRetrospective Studies