Echocardiography, TransesophagealEchocardiographyEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, Doppler, ColorHeart Septal Defects, AtrialEchocardiography, StressMitral ValveContrast MediaHeart AtriaHeart DiseasesAtrial AppendageMitral Valve InsufficiencyDobutamineEmbolismHeart Valve ProsthesisHeart NeoplasmsHeart Valve DiseasesCoronary CirculationAortic DiseasesEchocardiography, Doppler, PulsedCardiac CatheterizationVentricular Function, LeftEsophagusIntraoperative CareObserver VariationFluorocarbonsAortic ValveThrombosisHeart VentriclesSensitivity and SpecificityMonitoring, IntraoperativePredictive Value of TestsForamen Ovale, PatentVentricular Dysfunction, LeftHeart SeptumAtrial Function, LeftMitral Valve ProlapseCardiac Surgical ProceduresStroke VolumeAortic Valve InsufficiencyProspective StudiesChordae TendineaeDiatrizoate MeglumineHeart Valve Prosthesis ImplantationHeart AneurysmFeasibility StudiesMyxomaEmbolism, ParadoxicalBlood Flow VelocityEndocarditisAorta, ThoracicIntraoperative PeriodHeart Defects, CongenitalPulmonary VeinsAtrial FibrillationHemodynamicsSeptal Occluder DeviceMyocardial ContractionElectrocardiographyMitral Valve StenosisDipyridamoleReproducibility of ResultsEndocarditis, BacterialElectric CountershockCoronary AngiographyMyocardial InfarctionSystoleHeart Septal Defects, VentricularTricuspid ValveIntracranial EmbolismAortic Valve StenosisThoraxSulfur HexafluorideCoronary DiseaseDiastoleAortic AneurysmCardiotonic AgentsTricuspid Valve InsufficiencyUltrasonography, InterventionalMyocardial StunningHeart RuptureMyocardial IschemiaTreatment OutcomeThromboembolismExercise TestFollow-Up StudiesHeartDiatrizoateBenzocaineAlbuminsValsalva ManeuverEmbolism, AirAneurysm, DissectingEvaluation Studies as TopicMicrobubblesAtrial SeptumCardiomyopathy, HypertrophicPulmonary ArteryTime Factors