Magnetic Resonance Imaging, CineEchocardiographyMyocytes, CardiacHeartObserver VariationHeart VentriclesVentricular Function, LeftImage Interpretation, Computer-AssistedReproducibility of ResultsCardiac OutputMyocardial ContractionContrast MediaMyocardiumPredictive Value of TestsVentricular Dysfunction, LeftArrhythmias, CardiacCardiac Surgical ProceduresDeath, Sudden, CardiacStroke VolumeTime FactorsCoronary CirculationProspective StudiesMagnetic Resonance ImagingFeasibility StudiesSensitivity and SpecificityAxisImage Processing, Computer-AssistedCardiomegalyCardiac Pacing, ArtificialCardiac TamponadeHeart DiseasesCardiac CatheterizationHeart ArrestHeart FailureElectrocardiographyMyoblasts, CardiacCardiomyopathiesCardiac MyosinsCardiac Imaging TechniquesHeart RateCardiac GlycosidesCardiac Output, LowHemodynamicsHypothalamo-Hypophyseal SystemOut-of-Hospital Cardiac ArrestMyocardial InfarctionCardiac VolumeVentricular RemodelingHeart TransplantationTroponin IPituitary-Adrenal SystemHeart Defects, CongenitalTreatment OutcomeBlood PressureDogsRats, Sprague-DawleyHeart Conduction SystemHeart Function TestsCardiac Resynchronization TherapyTroponin TCells, CulturedMolecular Sequence DataCardiopulmonary ResuscitationHeart NeoplasmsCardiac Care FacilitiesCardiomyopathy, DilatedSignal TransductionDisease Models, AnimalCardiotonic AgentsMyocardial IschemiaCalciumModels, CardiovascularCardiac ElectrophysiologyFibrosisFetal HeartHeart AtriaRNA, MessengerFollow-Up StudiesVentricular FunctionMice, TransgenicMice, Inbred C57BLBody PatterningRats, WistarRetrospective StudiesHeart InjuriesRisk FactorsBase SequenceGene Expression Regulation, DevelopmentalCardiopulmonary BypassMice, KnockoutAnimals, NewbornSarcomeresHypertrophy, Left VentricularAmino Acid SequenceTroponinMuscle ProteinsBiological MarkersIsoproterenolMyocarditisAtrial Natriuretic Factor