Ventricular Dysfunction, LeftVentricular DysfunctionVentricular Dysfunction, RightVentricular Function, LeftEchocardiographyStroke VolumeHeart FailureCardiomyopathiesNatriuretic Peptide, BrainHemodynamicsHeart VentriclesMyocardial ContractionMyocardial InfarctionElectrocardiographyRadionuclide VentriculographyMyocardiumVentricular RemodelingHeartHypertrophy, Left VentricularSystoleCardiomyopathy, DilatedMyocardial StunningDiastoleMyocardial IschemiaDobutamineErectile DysfunctionTreatment OutcomeCardiotonic AgentsFollow-Up StudiesTime FactorsEchocardiography, DopplerTakotsubo CardiomyopathyPredictive Value of TestsProspective StudiesAngiotensin-Converting Enzyme InhibitorsPrognosisMitral Valve InsufficiencyEnalaprilVentricular Function, RightCoronary CirculationCoronary DiseaseCoronary Artery BypassExercise TestHeart DiseasesBiological MarkersThallium RadioisotopesVentricular PressureCardiac Output, LowTomography, Emission-Computed, Single-PhotonDisease Models, AnimalSeverity of Illness IndexPulmonary EmbolismTransposition of Great VesselsBlood PressureChronic DiseaseRisk FactorsArrhythmias, CardiacDogsMyocardial RevascularizationHeart RateAtrial Function, LeftCardiac Pacing, ArtificialRetrospective StudiesTissue SurvivalHeart Function TestsCardiac CatheterizationHeart AtriaDefibrillators, ImplantableAtrial Natriuretic FactorCardiac VolumeAortic Valve StenosisTachycardia, VentricularCoronary AngiographyAdrenergic beta-AntagonistsVasodilator AgentsPulmonary Wedge PressureMitral ValveAortic ValveCardiac OutputSensitivity and SpecificityRisk AssessmentMyocytes, CardiacFibrosisPreexisting Condition CoverageHypertension, PulmonaryGated Blood-Pool ImagingAtrial PressureCoronary Artery DiseaseEndocardial FibroelastosisAnti-Arrhythmia AgentsCardiomegalyCoronary VesselsAnalysis of VarianceVentricular FunctionTroponin IIntra-Aortic Balloon PumpingSurvival RateDeath, Sudden, CardiacEchocardiography, StressCardiopulmonary Bypass