Ischemic Attack, TransientRegional Blood FlowBlood Flow VelocityStrokeCerebrovascular DisordersCerebrovascular CirculationBrain IschemiaTime FactorsCarotid StenosisCarotid Artery DiseasesRisk FactorsEndarterectomy, CarotidLaser-Doppler FlowmetryCerebral InfarctionProspective StudiesFollow-Up StudiesRecurrenceBlood PressureTreatment OutcomeCerebral ArteriesXenon RadioisotopesFlow CytometryEndarterectomyCerebral AngiographyCarotid ArteriesBrainIntracranial ArteriosclerosisIntracranial EmbolismIntracranial Embolism and ThrombosisUltrasonography, Doppler, TranscranialCarotid Artery, InternalVascular ResistanceMoyamoya DiseaseMagnetic Resonance ImagingAspirinHemodynamicsNeurologyIntracranial Arterial DiseasesPulsatile FlowVertebrobasilar InsufficiencyPredictive Value of TestsMagnetic Resonance AngiographyEmbolismSeverity of Illness IndexAmaurosis FugaxTomography, X-Ray ComputedRetrospective StudiesCohort StudiesAnticoagulantsPlatelet Aggregation InhibitorsMicrocirculationSecondary PreventionDogsCerebral HemorrhageArterial Occlusive DiseasesMicrospheresMigraine DisordersTomography, Emission-ComputedAtrial FibrillationAge FactorsUltrasonography, DopplerOxygenAcute DiseaseRisk AssessmentUltrasonography, Doppler, ColorRiskInfarction, Posterior Cerebral ArteryAngiographyDiffusion Magnetic Resonance ImagingDipyridamoleOxygen ConsumptionCollateral CirculationEmergency Medical ServicesUltrasonographyMiddle Cerebral ArteryVasodilationComorbidityAcetazolamideRenal CirculationConstriction, PathologicIncidenceForamen Ovale, PatentCerebral RevascularizationHypertensionCarbon DioxideAuscultationLiver CirculationIschemiaSulfinpyrazoneHeart RatePulmonary CirculationWarfarinReproducibility of ResultsRheologyUltrasonography, Doppler, DuplexReflex, BabinskiNeurologic ExaminationPrognosisPostoperative ComplicationsStents