EchocardiographyEchocardiography, TransesophagealEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, StressEchocardiography, Doppler, ColorEchocardiography, Doppler, PulsedDobutamineVentricular Function, LeftVentricular Dysfunction, LeftMitral ValveHeart VentriclesStroke VolumeObserver VariationMitral Valve InsufficiencyHeart DiseasesSensitivity and SpecificityHeart AtriaHeart Septal Defects, AtrialPredictive Value of TestsHeart Valve DiseasesDiastoleSystoleElectrocardiographyCardiac CatheterizationExercise TestHeart Defects, CongenitalMyocardial ContractionHeart NeoplasmsReproducibility of ResultsProspective StudiesCardiotonic AgentsAortic ValveContrast MediaFeasibility StudiesFetal HeartEchocardiography, Four-DimensionalHypertrophy, Left VentricularHemodynamicsBlood Flow VelocityHeart SeptumCoronary CirculationHeart Valve ProsthesisTricuspid Valve InsufficiencyHeartAortic Valve InsufficiencyTricuspid ValveAortic Valve StenosisMyocardial InfarctionCardiomyopathiesMitral Valve ProlapseHeart FailureMitral Valve StenosisDipyridamoleAtrial Function, LeftCardiac VolumeMyocardial IschemiaVentricular RemodelingVentricular Function, RightPericardial EffusionFollow-Up StudiesVentricular Dysfunction, RightCoronary DiseaseTime FactorsCoronary AngiographyHeart Valve Prosthesis ImplantationCardiomyopathy, HypertrophicHeart MurmursMyocardiumTreatment OutcomeCardiomyopathy, DilatedHeart Septal Defects, VentricularCardiac Surgical ProceduresImage Interpretation, Computer-AssistedMyxomaEmbolismHeart AneurysmAtrial AppendageFluorocarbonsHypertension, PulmonarySeverity of Illness IndexPrognosisTomography, Emission-Computed, Single-PhotonUltrasonography, PrenatalHeart Function TestsPulmonary ArteryEndocarditisRetrospective StudiesForamen Ovale, PatentMagnetic Resonance ImagingThrombosisMyocardial StunningVentricular DysfunctionNatriuretic Peptide, BrainPhonocardiographyIntraoperative CareAtrial FibrillationChordae TendineaeTissue SurvivalPulmonary Embolism