Ischemic Attack, TransientStrokeBrain IschemiaCerebrovascular DisordersCerebral InfarctionRisk FactorsCarotid StenosisCerebral HemorrhageFibrinolytic AgentsProspective StudiesTime FactorsCarotid Artery DiseasesFollow-Up StudiesTissue Plasminogen ActivatorCerebral AngiographyEndarterectomy, CarotidAcute DiseaseTreatment OutcomeRecurrenceIntracranial EmbolismThrombolytic TherapyTomography, X-Ray ComputedIntracranial Embolism and ThrombosisAspirinBrain InfarctionIntracranial ArteriosclerosisIntracranial HemorrhagesCarotid Artery, InternalInfarction, Middle Cerebral ArteryIntracranial Arterial DiseasesCohort StudiesCerebrovascular CirculationRetrospective StudiesAnticoagulantsCerebral RevascularizationPredictive Value of TestsIntracranial ThrombosisRiskCarotid ArteriesPlatelet Aggregation InhibitorsAtrial FibrillationNeurologyIncidenceMagnetic Resonance AngiographyArterial Occlusive DiseasesSeverity of Illness IndexMagnetic Resonance ImagingEmbolismCerebral ArteriesAge FactorsSecondary PreventionBrainArchaeoglobalesDiffusion Magnetic Resonance ImagingWarfarinVertebrobasilar InsufficiencyComorbidityEndarterectomyRisk AssessmentRegistriesPrognosisUltrasonography, Doppler, TranscranialEmergency Medical ServicesOdds RatioMoyamoya DiseaseSecologanin Tryptamine AlkaloidsInfarction, Posterior Cerebral ArteryRecovery of FunctionAmaurosis FugaxNeurologic ExaminationCase-Control StudiesParesisHypertensionMultivariate AnalysisForamen Ovale, PatentNeuroprotective AgentsMigraine DisordersProportional Hazards ModelsReperfusionMiddle Cerebral ArteryLogistic ModelsVascular DiseasesSex FactorsCerebral Arterial DiseasesCatharanthusCarotid Artery ThrombosisIschemiaRandomized Controlled Trials as TopicThromboembolismTiclopidineUnited StatesEchocardiography, TransesophagealStroke, LacunarMyocardial InfarctionStentsRegression AnalysisAngiographyNervous System DiseasesHemorrhageConstriction, Pathologic