Heart NeoplasmsEchocardiographyEchocardiography, TransesophagealHeartEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, StressEchocardiography, Doppler, ColorHeart RateEchocardiography, Doppler, PulsedHeart DiseasesDobutamineVentricular Function, LeftHeart FailureHeart Defects, CongenitalVentricular Dysfunction, LeftHeart AtriaStroke VolumeFetal HeartMitral ValveHeart VentriclesMyocardial ContractionMitral Valve InsufficiencyHeart Septal Defects, AtrialPredictive Value of TestsDiastoleSystoleCardiotonic AgentsExercise TestCardiac CatheterizationHemodynamicsSensitivity and SpecificityObserver VariationHeart TransplantationHeart Valve DiseasesProspective StudiesHeart SeptumMyocardial IschemiaHeart Valve ProsthesisHeart ValvesMyocardiumElectrocardiographyHypertrophy, Left VentricularMyocardial InfarctionCardiomyopathiesCoronary DiseaseAortic ValveContrast MediaHeart Function TestsVentricular RemodelingEchocardiography, Four-DimensionalBlood Flow VelocityFeasibility StudiesPancreatic NeoplasmsFollow-Up StudiesReproducibility of ResultsTime FactorsTricuspid Valve InsufficiencyCardiomyopathy, DilatedNeoplasmsAortic Valve InsufficiencyCoronary CirculationTricuspid ValveAortic Valve StenosisCardiac VolumeTreatment OutcomeMitral Valve StenosisVentricular Function, RightAtrial Function, LeftMitral Valve ProlapseHeart Valve Prosthesis ImplantationHeart Septal Defects, VentricularDipyridamoleVentricular Dysfunction, RightPrognosisPericardial EffusionNeoplasms, Cystic, Mucinous, and SerousCardiac Surgical ProceduresHeart BlockMyxomaCardiomyopathy, HypertrophicRetrospective StudiesHeart AneurysmRisk FactorsCoronary AngiographyNatriuretic Peptide, BrainRheumatic Heart DiseaseEmbolismHeart InjuriesHeart MurmursAtrial AppendageSeverity of Illness IndexCardiomegalyDogsPulmonary ArteryVentricular DysfunctionVentricular PressureUltrasonography, PrenatalHeart Septal DefectsFluorocarbons