Ventricular Function, LeftVentricular Dysfunction, LeftSystoleStroke VolumeEchocardiographyVentricular Function, RightHeart VentriclesDiastoleMyocardial ContractionVentricular FunctionHeartHeart FailureEchocardiography, DopplerHemodynamicsElectrocardiographyProspective StudiesMyocardial InfarctionVentricular Dysfunction, RightRadionuclide VentriculographyMyocardiumGated Blood-Pool ImagingRadionuclide AngiographyCoronary CirculationHeart Function TestsHypertrophy, Left VentricularCardiomyopathy, DilatedCardiac CatheterizationVentricular RemodelingCineangiographyTime FactorsCoronary DiseaseHeart RateCardiac VolumeVentriculography, First-PassVentricular PressureCardiac OutputCardiomyopathiesEchocardiography, Doppler, PulsedMyocardial IschemiaTreatment OutcomeDobutamineFollow-Up StudiesAngiocardiographyExercise TestBlood PressureAtrial Function, LeftCardiotonic AgentsVentricular DysfunctionCoronary AngiographyMagnetic Resonance Imaging, CineCoronary Artery BypassEchocardiography, Doppler, ColorCardiac Pacing, ArtificialTomography, Emission-Computed, Single-PhotonMitral Valve InsufficiencyPredictive Value of TestsPhonocardiographyMyocardial ReperfusionDogsMitral ValveGold RadioisotopesHeart DiseasesCoronary VesselsAortic Valve StenosisTricuspid ValveMyocardial Reperfusion InjuryAngioplasty, Balloon, CoronaryTechnetium Tc 99m SestamibiAngina PectorisAdrenergic beta-AntagonistsEchocardiography, StressPulmonary ArteryNatriuretic Peptide, BrainPrognosisRecovery of FunctionKinetocardiographyTetralogy of FallotCardiac Surgical ProceduresCineradiographyHeart AtriaTransposition of Great VesselsMyocardial StunningHeart AneurysmVentricular SeptumStreptokinaseBlood Flow VelocityArrhythmias, CardiacDisease Models, AnimalMyocardial RevascularizationTissue SurvivalPacemaker, ArtificialHeart SeptumHeart Valve Prosthesis ImplantationObserver VariationMetoprololEndocardiumCardiac Output, LowExercise ToleranceHeart Valve ProsthesisMyocarditis