Carotid Artery, InternalCarotid ArteriesCarotid Artery DiseasesCarotid StenosisCarotid Artery, CommonCarotid Artery, ExternalCarotid Artery ThrombosisEndarterectomy, CarotidCarotid Artery, Internal, DissectionCerebral AngiographyArteriesArterial Occlusive DiseasesAngiography, Digital SubtractionCerebral ArteriesMagnetic Resonance AngiographyUltrasonography, Doppler, DuplexVertebral ArteryIschemic Attack, TransientCerebrovascular CirculationIntracranial AneurysmTunica IntimaEndarterectomyCircle of WillisStentsAngiographyCerebral RevascularizationCarotid BodyCarotid Artery InjuriesCavernous SinusTomography, X-Ray ComputedCerebrovascular DisordersAneurysmTunica MediaCarotid SinusIntracranial Embolism and ThrombosisBasilar ArteryBlood Flow VelocityBrain IschemiaAngioplasty, BalloonMiddle Cerebral ArteryOphthalmic ArteryUltrasonography, Doppler, TranscranialStrokeCerebral InfarctionCollateral CirculationCarotid Intima-Media ThicknessIntracranial EmbolismPulmonary ArteryArteriosclerosisAngioplastyUltrasonography, Doppler, ColorEmbolization, TherapeuticUltrasonographyFemoral ArteryTreatment OutcomeIntracranial ArteriosclerosisFibromuscular DysplasiaAmaurosis FugaxCatheterizationCarotid-Cavernous Sinus FistulaTemporal ArteriesSubclavian ArteryEpistaxisBalloon OcclusionMoyamoya DiseaseRenal ArteryPetrous BoneTime FactorsRisk FactorsAneurysm, RupturedMesenteric ArteriesProspective StudiesRegional Blood FlowHorner SyndromeConstriction, PathologicFollow-Up StudiesCranial Nerve DiseasesAneurysm, FalseInjections, Intra-ArterialUltrasonography, DopplerRadial ArteryMagnetic Resonance ImagingCerebral Arterial DiseasesRetrospective StudiesAnterior Cerebral ArteryPostoperative ComplicationsBlood PressureRetinal Artery OcclusionCoronary Artery BypassSphenoid BoneIliac ArterySubarachnoid HemorrhagePredictive Value of TestsAcetazolamideLigationInfarction, Middle Cerebral ArteryHemodynamicsBrainMammary ArteriesSensitivity and Specificity