StrokeIschemic Attack, TransientBrain IschemiaCerebrovascular DisordersCerebral InfarctionRisk FactorsCerebral HemorrhageFibrinolytic AgentsTime FactorsProspective StudiesTissue Plasminogen ActivatorAcute DiseaseFollow-Up StudiesCarotid StenosisTreatment OutcomeThrombolytic TherapyBrain InfarctionIntracranial EmbolismInfarction, Middle Cerebral ArteryIntracranial HemorrhagesRecurrenceIntracranial ArteriosclerosisCohort StudiesTomography, X-Ray ComputedCarotid Artery DiseasesCerebral AngiographyEndarterectomy, CarotidAnticoagulantsIntracranial Arterial DiseasesPredictive Value of TestsIntracranial ThrombosisAtrial FibrillationIncidenceRetrospective StudiesSeverity of Illness IndexMagnetic Resonance ImagingAspirinPlatelet Aggregation InhibitorsCerebrovascular CirculationNeurologyBrainIntracranial Embolism and ThrombosisMagnetic Resonance AngiographyCerebral ArteriesRiskEmbolismRecovery of FunctionWarfarinComorbiditySecondary PreventionDiffusion Magnetic Resonance ImagingParesisAge FactorsRegistriesRisk AssessmentCarotid Artery, InternalVertebrobasilar InsufficiencyCarotid ArteriesCerebral RevascularizationEndarterectomyEmergency Medical ServicesUltrasonography, Doppler, TranscranialOdds RatioNeurologic ExaminationPrognosisStroke, LacunarHypertensionCase-Control StudiesNeuroprotective AgentsInfarction, Posterior Cerebral ArteryMultivariate AnalysisAmaurosis FugaxReperfusionMoyamoya DiseaseProportional Hazards ModelsForamen Ovale, PatentMiddle Cerebral ArterySex FactorsLogistic ModelsStroke VolumeArterial Occlusive DiseasesMigraine DisordersHemiplegiaCerebral Arterial DiseasesVascular DiseasesUnited StatesRandomized Controlled Trials as TopicMyocardial InfarctionAphasiaIschemiaBlood PressureThromboembolismCarotid Artery ThrombosisRegression AnalysisEchocardiography, TransesophagealDisability EvaluationNervous System DiseasesHospitalizationTiclopidineHemorrhage