Myocytes, CardiacCardiac OutputHeartArrhythmias, CardiacCardiac Surgical ProceduresDeath, Sudden, CardiacCardiomegalyCardiac TamponadeCardiac Pacing, ArtificialHeart DiseasesMyocardiumCardiac CatheterizationMyocardial ContractionHeart VentriclesHeart ArrestMyoblasts, CardiacHeart FailureCardiomyopathiesCardiac MyosinsTime FactorsElectrocardiographyCardiac Imaging TechniquesCardiac GlycosidesHeart RateEchocardiographyCardiac Output, LowHemodynamicsOut-of-Hospital Cardiac ArrestMyocardial InfarctionCardiac VolumeVentricular RemodelingHeart TransplantationTroponin IVentricular Function, LeftHeart Defects, CongenitalBlood PressureCells, CulturedStroke VolumeRats, Sprague-DawleyDogsHeart Function TestsCardiac Resynchronization TherapyTroponin THeart Conduction SystemCardiopulmonary ResuscitationHeart NeoplasmsCardiac Care FacilitiesCardiomyopathy, DilatedCardiotonic AgentsVentricular Dysfunction, LeftTreatment OutcomeCalciumMyocardial IschemiaDisease Models, AnimalFibrosisCardiac ElectrophysiologyModels, CardiovascularPlay and PlaythingsFetal HeartProspective StudiesHeart AtriaVentricular FunctionMice, Inbred C57BLSignal TransductionMice, TransgenicRNA, MessengerHeart InjuriesMice, KnockoutMolecular Sequence DataRats, WistarCardiopulmonary BypassRisk FactorsFollow-Up StudiesTroponinHypertrophy, Left VentricularMyocarditisMuscle ProteinsIsoproterenolAtrial Natriuretic FactorSarcomeresRetrospective StudiesBiological MarkersAnimals, NewbornMitochondria, HeartPredictive Value of TestsHeart ValvesPericardiumGene Expression RegulationPacemaker, ArtificialEdema, CardiacPostoperative ComplicationsCoronary CirculationMagnetic Resonance Imaging, CineMyocardial Reperfusion InjuryVentricular FibrillationRabbitsNatriuretic Peptide, BrainCardiomyopathy, HypertrophicRisk AssessmentDose-Response Relationship, Drug