Myocytes, CardiacCardiac OutputHeartArrhythmias, CardiacCardiac Surgical ProceduresDeath, Sudden, CardiacCardiomegalyCells, CulturedCardiac TamponadeCardiac Pacing, ArtificialMyocardiumHeart DiseasesMyocardial ContractionCardiac CatheterizationHeart ArrestHeart VentriclesTime FactorsMyoblasts, CardiacHeart FailureCardiomyopathiesCardiac MyosinsCardiac Imaging TechniquesElectrocardiographyCardiac GlycosidesModels, BiologicalHeart RateEchocardiographyHemodynamicsCardiac Output, LowOut-of-Hospital Cardiac ArrestRats, Sprague-DawleyMyocardial InfarctionCardiac VolumeVentricular RemodelingHeart TransplantationTroponin IModels, CardiovascularVentricular Function, LeftDogsDisease Models, AnimalHeart Defects, CongenitalCell DifferentiationStroke VolumeCell Culture TechniquesCalciumCoculture TechniquesBlood PressureCardiac Resynchronization TherapyHeart Function TestsTroponin TFibrosisRNA, MessengerCell LineMyocardial IschemiaHeart Conduction SystemCardiopulmonary ResuscitationHeart NeoplasmsCardiac Care FacilitiesDose-Response Relationship, DrugCardiomyopathy, DilatedVentricular Dysfunction, LeftCardiotonic AgentsMice, Inbred C57BLTreatment OutcomeSignal TransductionCardiac ElectrophysiologyRats, WistarFetal HeartMice, TransgenicAnimals, NewbornHeart AtriaProspective StudiesGene Expression RegulationVentricular FunctionBiological MarkersHeart InjuriesApoptosisFibroblastsGene ExpressionEpithelial CellsMice, KnockoutCell SurvivalCardiopulmonary BypassBlotting, WesternReverse Transcriptase Polymerase Chain ReactionTroponinHypertrophy, Left VentricularRabbitsFollow-Up StudiesMyocarditisOrgan Culture TechniquesPredictive Value of TestsCollagenIsoproterenolSarcomeresAtrial Natriuretic FactorMuscle ProteinsRetrospective StudiesRisk FactorsSwine