Myocytes, CardiacHeartVentricular Dysfunction, LeftMyocardiumHeart DiseasesCardiomyopathiesMyocardial ContractionCardiomegalyHeart FailureCardiac OutputDiabetic CardiomyopathiesEchocardiographyVentricular DysfunctionVentricular RemodelingVentricular Function, LeftArrhythmias, CardiacDisease Models, AnimalCardiomyopathy, DilatedHemodynamicsHeart VentriclesDeath, Sudden, CardiacErectile DysfunctionHeart Function TestsStroke VolumeCardiotonic AgentsCardiac Output, LowCardiac Surgical ProceduresFibrosisMice, Inbred C57BLTime FactorsMyocardial InfarctionNatriuretic Peptide, BrainVentricular PressureMice, TransgenicRats, Sprague-DawleyElectrocardiographyMyocardial Reperfusion InjuryDiastoleHeart RateTroponin IMice, KnockoutOxidative StressSystoleMyocardial IschemiaBlood PressureMitochondria, HeartHypertrophy, Left VentricularCardiac Pacing, ArtificialSarcoplasmic Reticulum Calcium-Transporting ATPasesCardiac CatheterizationTroponin TRats, WistarDiabetes Mellitus, ExperimentalBiological MarkersSignal TransductionMyocarditisCardiac TamponadeVentricular Dysfunction, RightCalciumCells, CulturedCardio-Renal SyndromeFetal HeartEndomyocardial FibrosisApoptosisTreatment OutcomeEchocardiography, DopplerSepsisAtrial Natriuretic FactorMyocardial Depressant FactorProspective StudiesReactive Oxygen SpeciesCoronary CirculationHeart ArrestEndotoxemiaHeart Defects, CongenitalSarcomeresCardiotoxinsEndothelium, VascularMyosin Heavy ChainsDogsOrgan SizeBlotting, WesternIsoproterenolPerfusionRNA, MessengerRisk FactorsHypertensionVentricular FunctionGene Expression RegulationModels, AnimalMyoblasts, CardiacReceptors, Adrenergic, betaAdrenergic beta-1 Receptor AntagonistsAnthracyclinesCardiac MyosinsHeart InjuriesCardiac Imaging TechniquesNitric OxideNitric Oxide Synthase Type IIIFollow-Up Studies