HeartHeart VentriclesHeart RateCerebral VentriclesThird VentricleFourth VentricleHeart FailureLateral VentriclesHeart Defects, CongenitalCerebral Ventricle NeoplasmsHeart DiseasesMyocardiumHeart TransplantationFetal HeartHeart AtriaMyocardial ContractionHeart ValvesVentricular FunctionVentricular Function, LeftHeart BlockEchocardiographyHemodynamicsDogsHeart Function TestsMyocytes, CardiacHeart SeptumCardiomegalyEndocardiumVentricular Function, RightStroke VolumeMyocardial IschemiaTime FactorsVentricular Dysfunction, LeftHeart Arrest, InducedCardiomyopathy, DilatedVentricular RemodelingCardiomyopathiesDouble Outlet Right VentricleMyocardial InfarctionHeart InjuriesModels, CardiovascularHeart Septal Defects, VentricularHydrocephalusPerfusionVentricular Dysfunction, RightDiastoleVentricular PressureCardiac Pacing, ArtificialCoronary DiseaseSystoleInjections, IntraventricularHypoplastic Left Heart SyndromeCardiac Output, LowRats, WistarCerebral VentriculographyCardiotonic AgentsRats, Sprague-DawleyHeart NeoplasmsHypertrophy, Left VentricularDisease Models, AnimalEpendymaHypertrophy, Right VentricularPericardiumHeart Septal DefectsCardiac VolumeMyocardial Reperfusion InjuryTransposition of Great VesselsHeart Valve ProsthesisHeart, ArtificialCardiac Surgical ProceduresTreatment OutcomeCardiac CatheterizationMagnetic Resonance ImagingEchocardiography, DopplerAdrenergic beta-AntagonistsFollow-Up StudiesVentricular DysfunctionHeart AneurysmPapillary MusclesHeart Failure, SystolicAngiocardiographyRisk FactorsElectrocardiographyProspective StudiesHeart Rate, FetalIsoproterenolPulmonary ArteryAtrial FunctionNatriuretic Peptide, BrainRheumatic Heart DiseaseHeart ArrestAction PotentialsRabbitsOxygen ConsumptionVentricular FibrillationRNA, MessengerHeart Failure, DiastolicNorepinephrineTricuspid ValveFontan Procedure