Myocytes, CardiacCardiac OutputHeartArrhythmias, CardiacCardiac Surgical ProceduresDeath, Sudden, CardiacCardiomegalyCardiac TamponadeCardiac Pacing, ArtificialHeart DiseasesMyocardiumCardiac CatheterizationMyocardial ContractionHeart ArrestHeart VentriclesMyoblasts, CardiacHeart FailureCardiomyopathiesCardiac MyosinsCardiac Imaging TechniquesElectrocardiographyCardiac GlycosidesHeart RateEchocardiographyCardiac Output, LowOut-of-Hospital Cardiac ArrestTime FactorsHemodynamicsMyocardial InfarctionCardiac VolumeVentricular RemodelingHeart TransplantationTroponin IVentricular Function, LeftHeart Defects, CongenitalStroke VolumeBlood PressureCardiac Resynchronization TherapyHeart Function TestsTroponin THeart Conduction SystemCardiopulmonary ResuscitationHeart NeoplasmsCardiac Care FacilitiesDogsCardiomyopathy, DilatedVentricular Dysfunction, LeftCardiotonic AgentsMyocardial IschemiaTreatment OutcomeCardiac ElectrophysiologyModels, CardiovascularFibrosisRats, Sprague-DawleyFetal HeartCalciumHeart AtriaProspective StudiesVentricular FunctionDisease Models, AnimalCells, CulturedHeart InjuriesCardiopulmonary BypassTroponinHypertrophy, Left VentricularFollow-Up StudiesMyocarditisMice, TransgenicIsoproterenolSarcomeresAtrial Natriuretic FactorMuscle ProteinsRetrospective StudiesRisk FactorsMitochondria, HeartHeart ValvesPericardiumPredictive Value of TestsRats, WistarPacemaker, ArtificialEdema, CardiacBiological MarkersMice, Inbred C57BLMagnetic Resonance Imaging, CinePostoperative ComplicationsVentricular FibrillationAnimals, NewbornCoronary CirculationNatriuretic Peptide, BrainMyocardial Reperfusion InjuryCardiomyopathy, HypertrophicMice, KnockoutVentricular PressureRisk AssessmentCoronary Artery BypassSarcolemmaMyosin Heavy ChainsCoronary VesselsSignal TransductionThermodilution