Myotonia CongenitaIschemic Attack, TransientParesisStrokeCerebrovascular DisordersBrain IschemiaFacial ParalysisCarotid StenosisAbducens Nerve DiseasesOculomotor Nerve DiseasesCarotid Artery DiseasesTime FactorsCerebral InfarctionEndarterectomy, CarotidRisk FactorsParturient ParesisCerebral AngiographyFollow-Up StudiesParalysisRecurrenceCarotid Artery, InternalProspective StudiesParaparesis, SpasticEndarterectomyDiplopiaMagnetic Resonance ImagingOphthalmoplegiaTomography, X-Ray ComputedIntracranial ArteriosclerosisBrain Stem InfarctionsTreatment OutcomeIntracranial EmbolismHorner SyndromeIntracranial Arterial DiseasesNeurologyIntracranial Embolism and ThrombosisAmaurosis FugaxAspirinCarotid ArteriesMoyamoya DiseaseEmbolismVertebrobasilar InsufficiencySecondary PreventionAnticoagulantsNeurologic ExaminationPlatelet Aggregation InhibitorsHemiplegiaCalciumAbducens NerveRetrospective StudiesCerebral ArteriesAtrial Fibrillation