LaboratoriesMyocytes, CardiacCardiac OutputHeartLaboratories, HospitalArrhythmias, CardiacCardiac Surgical ProceduresClinical Laboratory TechniquesDeath, Sudden, CardiacAnimals, LaboratoryMedical Laboratory PersonnelCardiomegalyCardiac TamponadeCardiac Pacing, ArtificialHeart DiseasesCardiac CatheterizationMyocardiumMyocardial ContractionHeart ArrestHeart VentriclesTime FactorsClinical Laboratory Information SystemsHeart FailureMyoblasts, CardiacCardiomyopathiesElectrocardiographyCardiac MyosinsCardiac Imaging TechniquesHeart RateEchocardiographyCardiac GlycosidesHemodynamicsCardiac Output, LowMyocardial InfarctionOut-of-Hospital Cardiac ArrestCardiac VolumeHeart TransplantationVentricular RemodelingVentricular Function, LeftTroponin ILaboratory PersonnelTreatment OutcomeDogsProspective StudiesHeart Defects, CongenitalBlood PressureSensitivity and SpecificityStroke VolumeTroponin THeart Function TestsQuality ControlReproducibility of ResultsRetrospective StudiesLaboratory Proficiency TestingLaboratory Animal ScienceCardiac Resynchronization TherapyCardiopulmonary ResuscitationHeart Conduction SystemCardiac Care FacilitiesHeart NeoplasmsDisease Models, AnimalVentricular Dysfunction, LeftCardiomyopathy, DilatedCardiotonic AgentsMyocardial IschemiaRats, Sprague-DawleyPredictive Value of TestsModels, CardiovascularChemistry, ClinicalCardiac ElectrophysiologyRisk FactorsFibrosisCalciumCells, CulturedBiological MarkersFollow-Up StudiesFetal HeartMedical Laboratory ScienceHeart AtriaVentricular FunctionHeart InjuriesClinical Laboratory ServicesCardiopulmonary BypassRisk AssessmentTroponinMice, TransgenicMyocarditisHypertrophy, Left VentricularMicrobiologyMice, Inbred C57BLRats, WistarIsoproterenolAtrial Natriuretic FactorMuscle ProteinsSarcomeresPrognosisHeart ValvesRabbitsPostoperative ComplicationsMitochondria, Heart