Ventricular Function, LeftHeart VentriclesVentricular Function, RightVentricular FunctionVentricular Dysfunction, LeftStroke VolumeEchocardiographyHeartMyocardial ContractionCerebral VentriclesVentricular Dysfunction, RightMyocardiumMyocardial InfarctionSystoleThird VentricleFourth VentricleHemodynamicsDiastoleElectrocardiographyHeart FailureRadionuclide VentriculographyLateral VentriclesGated Blood-Pool ImagingHypertrophy, Left VentricularEchocardiography, DopplerCoronary CirculationCerebral Ventricle NeoplasmsRadionuclide AngiographyHeart Function TestsCardiomyopathy, DilatedVentricular RemodelingCardiac CatheterizationTime FactorsCardiac VolumeHeart RateVentricular PressureCardiomyopathiesCineangiographyAngiocardiographyDogsCardiac OutputBlood PressureCoronary DiseaseMyocardial IschemiaEchocardiography, Doppler, PulsedTreatment OutcomeCardiac Pacing, ArtificialVentricular DysfunctionVentriculography, First-PassFollow-Up StudiesDobutamineHeart AtriaCardiotonic AgentsEchocardiography, Doppler, ColorExercise TestProspective StudiesMagnetic Resonance Imaging, CineAtrial Function, LeftTransposition of Great VesselsEndocardiumMitral ValveHeart Defects, CongenitalCoronary AngiographyTricuspid ValveTomography, Emission-Computed, Single-PhotonHeart DiseasesMitral Valve InsufficiencyCoronary VesselsCoronary Artery BypassHeart SeptumPhonocardiographyPredictive Value of TestsPulmonary ArteryAortic Valve StenosisMyocardial ReperfusionHypertrophy, Right VentricularHeart AneurysmCardiac Surgical ProceduresTetralogy of FallotVentricular SeptumMyocardial Reperfusion InjuryPericardiumCardiomegalyGold RadioisotopesAdrenergic beta-AntagonistsTechnetium Tc 99m SestamibiArrhythmias, CardiacMyocytes, CardiacMagnetic Resonance ImagingDisease Models, AnimalNatriuretic Peptide, BrainAngioplasty, Balloon, CoronaryAngina PectorisPacemaker, ArtificialKinetocardiographyCineradiographyBlood Flow VelocityCerebral VentriculographyEchocardiography, StressHypoplastic Left Heart Syndrome