Models, CardiovascularMyocytes, CardiacCardiac OutputHeartArrhythmias, CardiacCardiac Surgical ProceduresDeath, Sudden, CardiacTime FactorsCardiac Pacing, ArtificialMyocardiumCardiomegalyHeart DiseasesCardiac TamponadeMyocardial ContractionCardiac CatheterizationHeart VentriclesModels, BiologicalHeart RateComputer SimulationAlgorithmsHeart ArrestElectrocardiographyHemodynamicsHeart FailureReproducibility of ResultsTreatment OutcomeProspective StudiesEchocardiographyCardiomyopathiesBlood PressureMyoblasts, CardiacCardiac Imaging TechniquesVentricular Function, LeftKineticsCardiac MyosinsCardiac GlycosidesMyocardial InfarctionPredictive Value of TestsCardiac Output, LowVentricular RemodelingDogsSensitivity and SpecificityRetrospective StudiesCardiac VolumeStroke VolumeOut-of-Hospital Cardiac ArrestRats, Sprague-DawleyHeart TransplantationTroponin IDisease Models, AnimalBiological MarkersVentricular Dysfunction, LeftFollow-Up StudiesPrognosisRats, WistarModels, TheoreticalHeart Defects, CongenitalModels, StatisticalHeart Function TestsHeart Conduction SystemAnalysis of VarianceCalciumRisk FactorsCardiac Resynchronization TherapyCardiomyopathy, DilatedCardiotonic AgentsDose-Response Relationship, DrugTroponin TMyocardial IschemiaCells, CulturedCardiopulmonary ResuscitationCardiac ElectrophysiologyVentricular FunctionFibrosisHeart AtriaMagnetic Resonance ImagingHeart NeoplasmsCardiac Care FacilitiesBody WeightReference ValuesFetal HeartOrgan SizeRisk AssessmentSeverity of Illness IndexMice, Inbred C57BLImage Processing, Computer-AssistedRabbitsEchocardiography, DopplerImage Interpretation, Computer-Assisted