HeartHeart RateAnterior ChamberHeart FailureHeart DiseasesHeart Defects, CongenitalHeart TransplantationDiffusion Chambers, CultureFetal HeartHeart ValvesHeart AtriaAtmosphere Exposure ChambersHeart BlockMyocardiumMyocardial ContractionHeart Function TestsHeart Arrest, InducedTime FactorsMyocardial IschemiaMyocytes, CardiacHemodynamicsVentricular Function, LeftPerfusionCoronary DiseaseEchocardiographyCardiac Output, LowCardiomyopathy, DilatedStroke VolumeCardiomegalyHeart InjuriesHeart SeptumMyocardial InfarctionDogsHeart, ArtificialHeart Failure, SystolicCardiomyopathiesCardiotonic AgentsVentricular Dysfunction, LeftVentricular RemodelingHeart Rate, FetalRisk FactorsMyocardial Reperfusion InjuryRheumatic Heart DiseaseRats, Sprague-DawleyDisease Models, AnimalHeart ArrestOxygen ConsumptionHeart Valve ProsthesisCardiac Pacing, ArtificialAdrenergic beta-AntagonistsProspective StudiesRabbitsRats, WistarHeart Failure, DiastolicFollow-Up StudiesAmerican Heart AssociationModels, CardiovascularIrisHeart Septal DefectsVentricular PressureDiastoleTreatment OutcomeHeart NeoplasmsChronic DiseaseEquipment DesignEnvironment, ControlledAutonomic Nervous SystemSystoleAqueous HumorExercise TestNatriuretic Peptide, BrainHypoplastic Left Heart SyndromeDose-Response Relationship, DrugEndocardiumSympathetic Nervous SystemNational Heart, Lung, and Blood Institute (U.S.)Cells, CulturedAnterior Eye SegmentCalciumPacemaker, ArtificialMice, Inbred C57BLRNA, MessengerIsoproterenolLenses, IntraocularBiological MarkersLens Implantation, IntraocularHeart Septal Defects, VentricularNorepinephrineHypertrophy, Left VentricularCataract ExtractionRetrospective StudiesHeart-Assist DevicesPropanolaminesEchocardiography, DopplerGonioscopyEnergy MetabolismPredictive Value of TestsElectrocardiography, AmbulatoryCardiac VolumeEye