Ventricular Function, LeftVentricular Function, RightVentricular FunctionStroke VolumeVentricular Dysfunction, LeftHeart VentriclesEchocardiographyHeartVentricular Dysfunction, RightMyocardial ContractionMyocardial InfarctionSystoleRadionuclide VentriculographyHemodynamicsRadionuclide AngiographyDiastoleGated Blood-Pool ImagingEchocardiography, DopplerHeart FailureMyocardiumElectrocardiographyHeart Function TestsCoronary CirculationCardiomyopathy, DilatedVentriculography, First-PassEchocardiography, Doppler, PulsedCineangiographyCardiac CatheterizationCoronary DiseaseHeart RateTime FactorsCardiac OutputCardiac VolumeVentricular RemodelingMyocardial IschemiaCardiomyopathiesDobutamineVentricular PressureExercise TestAngiocardiographyVentricular DysfunctionFollow-Up StudiesMitral Valve InsufficiencyCardiotonic AgentsProspective StudiesTreatment OutcomeCoronary Artery BypassMagnetic Resonance Imaging, CineBlood PressureGold RadioisotopesTomography, Emission-Computed, Single-PhotonCoronary AngiographyEchocardiography, Doppler, ColorMyocardial ReperfusionPhonocardiographyCardiac Pacing, ArtificialPredictive Value of TestsTricuspid ValveTechnetium Tc 99m SestamibiMyocardial Reperfusion InjuryAngioplasty, Balloon, CoronaryAngina PectorisAortic Valve StenosisHeart DiseasesRecovery of FunctionMitral ValveAdrenergic beta-AntagonistsCoronary VesselsEchocardiography, StressStreptokinaseTetralogy of FallotCineradiographyDogsTransposition of Great VesselsKinetocardiographyPulmonary ArteryNatriuretic Peptide, BrainPrognosisMyocardial StunningVentricular SeptumTissue SurvivalCardiac Surgical ProceduresMetoprololMyocardial RevascularizationExercise ToleranceArrhythmias, CardiacMyocarditisHypertrophy, Left VentricularCardiomegalyPulmonary Valve InsufficiencyHeart Valve Prosthesis ImplantationHypertrophy, Right VentricularHeart Valve ProsthesisPacemaker, ArtificialThrombolytic TherapyDisease Models, AnimalAortic Valve InsufficiencyMagnetic Resonance ImagingCardiac Output, LowObserver Variation