Ischemic Attack, TransientCarotid ArteriesCarotid Artery DiseasesCarotid Artery, InternalCarotid StenosisCarotid Artery, CommonStrokeEndarterectomy, CarotidCerebrovascular DisordersCarotid Artery, ExternalCarotid Artery ThrombosisBrain IschemiaArteriesCerebral AngiographyRisk FactorsEndarterectomyCerebral ArteriesCarotid Artery, Internal, DissectionCerebral InfarctionIntracranial ArteriosclerosisIntracranial EmbolismFollow-Up StudiesTime FactorsRecurrenceProspective StudiesMagnetic Resonance AngiographyStentsArterial Occlusive DiseasesIntracranial Embolism and ThrombosisAmaurosis FugaxTomography, X-Ray ComputedCarotid BodyUltrasonography, Doppler, DuplexCerebrovascular CirculationTreatment OutcomeEmbolismAngiographyAngioplastyVertebral ArteryIntracranial Arterial DiseasesTunica IntimaCarotid SinusAngioplasty, BalloonVertebrobasilar InsufficiencyPredictive Value of TestsAspirinUltrasonography, Doppler, TranscranialNeurologyBasilar ArteryMoyamoya DiseaseArteriosclerosisPlatelet Aggregation InhibitorsRetrospective StudiesAnticoagulantsPulmonary ArteryTunica MediaCerebral RevascularizationRisk AssessmentSecondary PreventionUltrasonographyCohort StudiesFemoral ArteryAngiography, Digital SubtractionCerebral HemorrhageAuscultationConstriction, PathologicPostoperative ComplicationsCarotid Intima-Media ThicknessMagnetic Resonance ImagingAtrial FibrillationCarotid Artery InjuriesDiffusion Magnetic Resonance ImagingSeverity of Illness IndexMiddle Cerebral ArteryRiskRenal ArteryFibromuscular DysplasiaBrainMesenteric ArteriesHypertensionBlood PressureAge FactorsIncidenceForamen Ovale, PatentWarfarinCircle of WillisEmergency Medical ServicesInfarction, Posterior Cerebral ArteryAtherosclerosisBlood Flow VelocityReflex, BabinskiComorbidityIntracranial AneurysmSubclavian ArteryUltrasonography, Doppler, ColorVascular DiseasesMigraine DisordersIntracranial ThrombosisIntracranial HemorrhagesNeurologic Examination