EchocardiographyHeart VentriclesEchocardiography, TransesophagealEchocardiography, DopplerEchocardiography, Three-DimensionalEchocardiography, StressEchocardiography, Doppler, ColorVentricular Function, LeftVentricular Dysfunction, LeftMyocardial ContractionEchocardiography, Doppler, PulsedHeartStroke VolumeMyocardiumVentricular FunctionHypertrophy, Left VentricularDobutamineMitral ValveDiastoleHeart AtriaSystoleCerebral VentriclesElectrocardiographyHemodynamicsHeart DiseasesVentricular RemodelingHeart SeptumHeart Defects, CongenitalMitral Valve InsufficiencyCardiac CatheterizationThird VentricleCoronary CirculationVentricular Function, RightFourth VentricleCardiac VolumeMyocardial InfarctionHeart FailureHeart AneurysmDogsCardiomyopathiesFetal HeartEndocardiumCardiomyopathy, DilatedHeart NeoplasmsHeart Septal Defects, AtrialObserver VariationCardiotonic AgentsVentricular Dysfunction, RightPredictive Value of TestsAtrial Function, LeftAortic ValveHeart Valve DiseasesPericardiumLateral VentriclesMyocardial IschemiaSensitivity and SpecificityVentricular PressureExercise TestBlood Flow VelocityAortic Valve StenosisBlood PressureTime FactorsTricuspid ValveHeart Septal Defects, VentricularCardiomyopathy, HypertrophicCerebral Ventricle NeoplasmsProspective StudiesCardiomegalyCardiac Surgical ProceduresContrast MediaHeart Valve ProsthesisAortic Valve InsufficiencyAngiocardiographyReproducibility of ResultsFeasibility StudiesHeart RateTricuspid Valve InsufficiencyCardiac Pacing, ArtificialHeart Function TestsModels, CardiovascularEchocardiography, Four-DimensionalTransposition of Great VesselsCardiac OutputCoronary AngiographyTreatment OutcomeCoronary DiseaseMitral Valve StenosisFollow-Up StudiesPulmonary ArteryHeart Valve Prosthesis ImplantationCoronary VesselsHeart InjuriesHypertension, PulmonaryCineangiographyFistulaTomography, Emission-Computed, Single-PhotonMagnetic Resonance ImagingHeart RuptureChordae TendineaeVentricular Dysfunction