Echocardiography, TransesophagealStrokeEchocardiographyIntracranial EmbolismIntracranial Embolism and ThrombosisEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, Doppler, ColorCerebrovascular DisordersEchocardiography, StressTissue Plasminogen ActivatorBrain IschemiaEmbolismHeart DiseasesCerebral InfarctionAtrial AppendageHeart NeoplasmsHeart Septal Defects, AtrialMitral ValveCerebral HemorrhageFibrinolytic AgentsHeart AtriaEchocardiography, Doppler, PulsedMitral Valve InsufficiencyAortic DiseasesStroke VolumeAtrial FibrillationInfarction, Middle Cerebral ArteryDobutamineEmbolism, ParadoxicalTime FactorsTreatment OutcomeProspective StudiesThrombolytic TherapyAnticoagulantsIschemic Attack, TransientHeart Valve DiseasesPredictive Value of TestsHeart Valve ProsthesisVentricular Function, LeftRisk FactorsEsophagusFollow-Up StudiesCardiac CatheterizationAortic ValveTomography, X-Ray ComputedMagnetic Resonance ImagingVentricular Dysfunction, LeftHeart VentriclesObserver VariationIntraoperative CareRecovery of FunctionSensitivity and SpecificityThrombosisAtrial Function, LeftMonitoring, IntraoperativeNeuroprotective AgentsIntracranial ThrombosisDisease Models, AnimalForamen Ovale, PatentMitral Valve ProlapseAortic Valve InsufficiencyCardiac Surgical ProceduresFeasibility StudiesWarfarinBlood Flow VelocityHeart Valve Prosthesis ImplantationElectrocardiographyHemodynamicsHeart Defects, CongenitalReproducibility of ResultsChordae TendineaeHeart SeptumRats, WistarDiastoleCerebral AngiographySystoleAorta, ThoracicHeart AneurysmEndocarditisBrainCerebrovascular CirculationMyocardial ContractionSeverity of Illness IndexMitral Valve StenosisMyxomaAcute DiseaseIntraoperative PeriodPulmonary VeinsContrast MediaAortic Valve StenosisExercise TestTricuspid ValveSeptal Occluder DeviceRetrospective StudiesEndocarditis, BacterialHeart Septal Defects, VentricularCoronary CirculationCoronary DiseaseThromboembolism