StrokeIschemic Attack, TransientCerebrovascular DisordersBrain IschemiaRisk FactorsTime FactorsProspective StudiesFollow-Up StudiesCarotid StenosisCerebral InfarctionEarly DiagnosisRetrospective StudiesTomography, X-Ray ComputedDelayed DiagnosisTreatment OutcomeRecurrenceSensitivity and SpecificityCarotid Artery DiseasesEndarterectomy, CarotidPredictive Value of TestsPrenatal DiagnosisCerebral HemorrhageCohort StudiesMagnetic Resonance ImagingIncidenceIntracranial EmbolismAcute DiseaseCerebral AngiographyNeurologyIntracranial ArteriosclerosisAge FactorsAnticoagulantsEndarterectomyPrognosisIntracranial Embolism and ThrombosisSeverity of Illness IndexAspirinIntracranial Arterial DiseasesCarotid Artery, InternalDiagnosisRisk AssessmentEmbolismAtrial FibrillationRiskPlatelet Aggregation InhibitorsSecondary PreventionCarotid ArteriesComorbidityMagnetic Resonance AngiographyVertebrobasilar InsufficiencyRegistriesReproducibility of ResultsDiagnostic ErrorsIntracranial HemorrhagesBrainMoyamoya DiseaseAmaurosis FugaxEmergency Medical ServicesCerebrovascular CirculationFibrinolytic AgentsCerebral ArteriesBrain InfarctionWarfarinParesisDiffusion Magnetic Resonance ImagingNeurologic ExaminationMigraine DisordersPrevalenceInfarction, Posterior Cerebral ArteryUnited StatesForamen Ovale, PatentUltrasonography, Doppler, TranscranialSex FactorsHypertensionIntracranial ThrombosisUltrasonographyMultivariate AnalysisCase-Control StudiesPostoperative ComplicationsAngiographyOdds RatioArterial Occlusive DiseasesLogistic ModelsCerebral RevascularizationBiopsyInfarction, Middle Cerebral ArteryAuscultationProportional Hazards ModelsBiological MarkersDiagnosis, Computer-AssistedNursing DiagnosisThrombolytic TherapySulfinpyrazoneHeart DiseasesTissue Plasminogen ActivatorHospitalizationMyocardial InfarctionRecovery of FunctionStentsSurvival Analysis