Models, CardiovascularCardiac OutputMyocytes, CardiacHeartCardiac Surgical ProceduresArrhythmias, CardiacDeath, Sudden, CardiacTime FactorsCardiac Pacing, ArtificialCardiomegalyHemodynamicsMyocardiumCardiac TamponadeHeart DiseasesMyocardial ContractionCardiac CatheterizationHeart RateHeart VentriclesCardiac Output, LowHeart ArrestHeart FailureBlood PressureElectrocardiographyEchocardiographyCardiomyopathiesMyoblasts, CardiacDogsCardiac MyosinsCardiac Imaging TechniquesVentricular Function, LeftModels, BiologicalTreatment OutcomeCardiac GlycosidesAlgorithmsCardiac VolumeMyocardial InfarctionProspective StudiesVentricular RemodelingRats, Sprague-DawleyReproducibility of ResultsComputer SimulationThermodilutionOut-of-Hospital Cardiac ArrestHeart Function TestsHeart TransplantationTroponin IHeart Defects, CongenitalStroke VolumeVentricular Dysfunction, LeftDisease Models, AnimalVascular ResistanceCardiotonic AgentsCalciumCardiac Resynchronization TherapyOxygen ConsumptionRats, WistarPredictive Value of TestsHeart Conduction SystemRetrospective StudiesCardiomyopathy, DilatedTroponin TCardiopulmonary ResuscitationVentricular FunctionMyocardial IschemiaKineticsFetal HeartFollow-Up StudiesAction PotentialsAnalysis of VarianceBiological MarkersCells, CulturedHeart NeoplasmsCardiac Care FacilitiesSensitivity and SpecificityHeart AtriaCardiac ElectrophysiologyFibrosisCardiac Output, HighRisk FactorsPrognosisCardiopulmonary BypassExercise TestMice, Inbred C57BL