Myocytes, CardiacCardiac OutputHeartCardiac Surgical ProceduresArrhythmias, CardiacDeath, Sudden, CardiacIntensive Care UnitsCardiomegalyCardiac TamponadeCardiac Pacing, ArtificialHeart DiseasesMyocardiumCardiac CatheterizationMyocardial ContractionHeart ArrestHeart VentriclesTime FactorsHeart FailureMyoblasts, CardiacCardiomyopathiesElectrocardiographyCardiac MyosinsCardiac Imaging TechniquesHeart RateCardiac GlycosidesEchocardiographyHospital UnitsCardiac Output, LowHemodynamicsOut-of-Hospital Cardiac ArrestMyocardial InfarctionCardiac VolumeHeart TransplantationVentricular RemodelingTroponin IVentricular Function, LeftHeart Defects, CongenitalTreatment OutcomeProspective StudiesBlood PressureStroke VolumeHeart Function TestsTroponin TCardiac Resynchronization TherapyCardiopulmonary ResuscitationCardiac Care FacilitiesDogsHeart Conduction SystemHeart NeoplasmsCardiotonic AgentsVentricular Dysfunction, LeftCardiomyopathy, DilatedCoronary Care UnitsMyocardial IschemiaIntensive Care Units, NeonatalRats, Sprague-DawleyCardiac ElectrophysiologyModels, CardiovascularCalciumFibrosisIntensive Care Units, PediatricFetal HeartRetrospective StudiesCells, CulturedDisease Models, AnimalHeart AtriaVentricular FunctionRisk FactorsHeart InjuriesFollow-Up StudiesCardiopulmonary BypassTroponinPredictive Value of TestsHypertrophy, Left VentricularMice, TransgenicMyocarditisSarcomeresIsoproterenolPostoperative ComplicationsMuscle ProteinsAction PotentialsRats, WistarAtrial Natriuretic FactorMitochondria, HeartHeart ValvesMice, Inbred C57BLPericardiumRisk AssessmentPacemaker, ArtificialAnimals, NewbornEdema, CardiacBiological MarkersVentricular FibrillationCoronary CirculationMagnetic Resonance Imaging, CineRabbitsNatriuretic Peptide, BrainMice, KnockoutMyocardial Reperfusion InjuryCoronary Artery Bypass