Foramen Ovale, PatentHeart Septal Defects, AtrialEmbolism, ParadoxicalForamen OvaleEchocardiography, TransesophagealStrokeSeptal Occluder DeviceAtrial SeptumHeart AneurysmIntracranial EmbolismPatents as TopicCardiac CatheterizationValsalva ManeuverPlasmodium ovaleEmbolismHeart SeptumMigraine with AuraIschemic Attack, TransientProstheses and ImplantsBalloon OcclusionHeart Septal DefectsSecondary PreventionMigraine DisordersEchocardiographyForamen MagnumDecompression SicknessUltrasonography, Doppler, TranscranialCardiac Surgical ProceduresBrain IschemiaRecurrenceCerebrovascular DisordersHigh Pressure Neurological SyndromeDivingTreatment OutcomeEmbolism, AirAnticoagulantsPulmonary EmbolismHeart AtriaRisk FactorsFollow-Up StudiesProspective StudiesStroke, LacunarIntracranial Embolism and ThrombosisContrast MediaThromboembolismEchocardiography, Doppler, ColorFluoroscopyDevice RemovalProsthesis ImplantationCarcinoid Heart DiseaseEmbolectomyVena Cava, InferiorWarfarinRetrospective StudiesMagnetic Resonance ImagingCardiac TamponadeRespiratory ParalysisHeart DiseasesPrevalenceAnoxiaThrombosisAspirinForeign-Body MigrationHeart ValvesCerebral InfarctionDyspneaEchocardiography, Three-DimensionalEchoencephalographyGelatinRadiography, InterventionalFibrinolytic AgentsCase-Control StudiesEquipment DesignAbsorbable ImplantsNeuroimagingElectrocardiographyCatheterizationProsthesis DesignAtrial AppendageAge FactorsPosturePlatelet Aggregation InhibitorsCerebral ArteriesTime FactorsIntention to Treat Analysis