Posterior Cerebral ArteryBasilar ArteryIntracranial AneurysmInfarction, Posterior Cerebral ArteryCerebral ArteriesAneurysmMiosisAneurysm, RupturedEmbolization, TherapeuticCerebral AngiographyCircle of WillisMiddle Cerebral ArteryCerebral InfarctionCerebral Arterial DiseasesVertebral ArteryAnterior Cerebral ArteryArteriesHemianopsiaCerebrovascular CirculationTomography, X-Ray ComputedInfarction, Middle Cerebral ArteryVertebrobasilar InsufficiencySubarachnoid HemorrhageUltrasonography, Doppler, TranscranialCarotid Artery, InternalMagnetic Resonance AngiographyAneurysm, InfectedAngiography, Digital SubtractionCoronary AneurysmSplenic ArteryMagnetic Resonance ImagingIliac AneurysmBrain IschemiaRenal ArteryOccipital LobeOculomotor Nerve DiseasesArterial Occlusive DiseasesBlood Flow VelocityTreatment OutcomeAortic AneurysmDyslexia, AcquiredPulmonary ArteryMoyamoya DiseaseIntracranial Arteriovenous MalformationsCarotid ArteriesBrainCerebral RevascularizationOphthalmoplegic MigraineFemoral ArteryIliac ArteryTonic PupilAneurysm, DissectingCarotid Artery DiseasesVasoconstrictionEchoencephalographyAmobarbitalAnisocoriaBlood Vessel Prosthesis ImplantationCerebrovascular DisordersCollateral CirculationRetrospective StudiesAortic Aneurysm, ThoracicPopliteal ArteryHeart AneurysmVasodilationAngiographyIntracranial Embolism and ThrombosisSubclavian ArteryMesenteric ArteriesFollow-Up StudiesCeliac ArteryVascular Surgical ProceduresMuscle, Smooth, VascularIschemic Attack, TransientEclampsiaMesenteric Artery, SuperiorHemiplegiaHepatic ArteryAneurysm, FalseEndovascular ProceduresStentsVasospasm, IntracranialDominance, CerebralBlood Vessel ProsthesisRegional Blood FlowTemporal ArteriesCoronary Artery BypassTime FactorsCarotid StenosisBronchial ArteriesIntracranial ArteriosclerosisStrokeSurgical InstrumentsRadial ArteryOphthalmic ArteryBlood PressureConstriction, PathologicCarotid Artery, CommonMucocutaneous Lymph Node SyndromeMammary Arteries