Ventricular Function, LeftVentricular Function, RightVentricular FunctionStroke VolumeHeartVentricular Dysfunction, LeftMyocytes, CardiacHeart VentriclesCardiac OutputEchocardiographyMyocardial ContractionMyocardial InfarctionMyocardiumHemodynamicsVentricular Dysfunction, RightHeart FailureCardiac Surgical ProceduresSystoleArrhythmias, CardiacElectrocardiographyCardiac CatheterizationRadionuclide VentriculographyDiastoleHeart Function TestsEchocardiography, DopplerCardiac Pacing, ArtificialRadionuclide AngiographyGated Blood-Pool ImagingDeath, Sudden, CardiacHeart RateCardiomyopathiesCardiomyopathy, DilatedTime FactorsHeart DiseasesCoronary CirculationCardiac VolumeVentricular RemodelingCardiomegalyMyocardial IschemiaCoronary DiseaseCardiotonic AgentsBlood PressureTreatment OutcomeProspective StudiesEchocardiography, Doppler, PulsedVentricular PressureFollow-Up StudiesExercise TestCineangiographyVentricular DysfunctionVentriculography, First-PassDobutamineMagnetic Resonance Imaging, CineCoronary Artery BypassCardiac Output, LowDogsPredictive Value of TestsCoronary AngiographyAngiocardiographyMitral Valve InsufficiencyTomography, Emission-Computed, Single-PhotonMyocardial Reperfusion InjuryEchocardiography, Doppler, ColorHeart Defects, CongenitalHeart TransplantationCardiac TamponadeMyocardial ReperfusionHeart ArrestCoronary VesselsAdrenergic beta-AntagonistsPhonocardiographyMyoblasts, CardiacNatriuretic Peptide, BrainDisease Models, AnimalAngioplasty, Balloon, CoronaryHypertrophy, Left VentricularGold RadioisotopesMyocarditisPrognosisAngina PectorisTricuspid ValveMitral ValveAortic Valve StenosisRecovery of FunctionCardiac MyosinsFibrosisTroponin IPacemaker, ArtificialTechnetium Tc 99m SestamibiEchocardiography, StressCardiac Resynchronization TherapyTroponin TPulmonary ArteryEdema, CardiacTetralogy of FallotRetrospective StudiesCardiopulmonary BypassCoronary Artery DiseaseTransposition of Great VesselsEndocardium