EchocardiographyEchocardiography, TransesophagealEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, StressContrast MediaEchocardiography, Doppler, ColorFluorocarbonsCoronary CirculationDobutamineDiatrizoate MeglumineHeart Septal Defects, AtrialVentricular Function, LeftEchocardiography, Doppler, PulsedMitral ValveHeart DiseasesObserver VariationVentricular Dysfunction, LeftHeart VentriclesHeart AtriaSensitivity and SpecificitySulfur HexafluorideMitral Valve InsufficiencyCardiac CatheterizationPredictive Value of TestsStroke VolumeHeart SeptumDiatrizoateDipyridamoleHeart NeoplasmsMyocardial ContractionAlbuminsMyocardial InfarctionMicrobubblesHeart Valve DiseasesBlood Flow VelocityFeasibility StudiesProspective StudiesElectrocardiographyHeart Defects, CongenitalHeart Valve ProsthesisMyocardial ReperfusionHemodynamicsAortic ValveCardiotonic AgentsAtrial AppendageSystoleMicrospheresCoronary AngiographyCoronary DiseaseReproducibility of ResultsExercise TestMyocardial StunningMyocardial IschemiaForamen Ovale, PatentEmbolismMyxomaThrombosisDogsEsophagusHeart AneurysmAtrial Function, LeftAortic Valve InsufficiencyDiastoleMitral Valve ProlapseCardiomyopathy, HypertrophicHeartIntraoperative CarePulmonary VeinsAortic DiseasesEmbolism, ParadoxicalMyocardiumCardiac Surgical ProceduresCardiomyopathiesHeart Valve Prosthesis ImplantationImage EnhancementMonitoring, IntraoperativeMitral Valve StenosisSonicationTomography, Emission-Computed, Single-PhotonCoronary VesselsHeart Septal DefectsPapaverineTricuspid ValveMicrocirculationTricuspid Valve InsufficiencyAortic Valve StenosisVentricular RemodelingFetal HeartTechnetium Tc 99m SestamibiChordae TendineaeFollow-Up StudiesVentricular Dysfunction, RightEndocarditisPulmonary ArteryHepatopulmonary SyndromeTreatment OutcomeHeart Septal Defects, VentricularValsalva ManeuverEchocardiography, Four-Dimensional