TransducersEchocardiographyEchocardiography, DopplerUltrasonographyColorEchocardiography, Doppler, ColorUltrasonic TherapyUltrasonicsHigh-Intensity Focused Ultrasound AblationUltrasonography, Doppler, ColorEquipment DesignEquipment Failure AnalysisBlood Flow VelocityEchocardiography, TransesophagealEchocardiography, Three-DimensionalAcousticsUltrasonography, DopplerNiobiumMitral Valve InsufficiencyElasticity Imaging TechniquesEchocardiography, StressMitral ValveEchocardiography, Doppler, PulsedPhantoms, ImagingMicrobubblesUltrasonography, InterventionalTricuspid Valve InsufficiencyComputer-Aided DesignHeart Valve DiseasesHeart Septal Defects, VentricularHeart ValvesSensitivity and SpecificityColor PerceptionFeasibility StudiesCardiac CatheterizationDoppler EffectCoronary CirculationUltrasonography, Doppler, PulsedReproducibility of ResultsModels, CardiovascularImage Interpretation, Computer-AssistedInsulin-Like Growth Factor Binding Protein 3Heart DiseasesImaging, Three-DimensionalImage EnhancementRegional Blood FlowPulmonary ArteryUltrasonography, PrenatalDobutamineVentricular Function, LeftUltrasonography, Doppler, TranscranialVentricular Dysfunction, LeftImage Processing, Computer-AssistedColor VisionObserver VariationColor Perception TestsPredictive Value of TestsProspective StudiesHeart VentriclesStroke VolumeDiastoleContrast MediaAlgorithmsPsoralensSystoleFetal HeartColor Vision DefectsTransducers, PressureHair ColorHeart AtriaHeart Septal Defects, AtrialPhenylacetatesHemodynamicsMyocardial ContractionPregnancySTAT3 Transcription FactorEchocardiography, Four-DimensionalElectrocardiographyAortic ValveExercise TestTime FactorsFluorocarbonsHeart NeoplasmsLaser-Doppler FlowmetryCardiotonic AgentsFetal DiseasesPulsatile FlowHeart SeptumHeart Valve ProsthesisTricuspid ValveFollow-Up StudiesAortic Valve StenosisGestational AgeVentricular Function, RightHeartCoronary AngiographyTreatment OutcomeEye ColorEye EnucleationHypertrophy, Left Ventricular