Heart VentriclesHeartHeart RateVentricular Function, LeftMyocardiumHeart FailureVentricular Dysfunction, LeftCerebral VentriclesMyocardial ContractionVentricular FunctionEchocardiographyHeart Defects, CongenitalThiramFourth VentricleHypertrophy, Left VentricularHeart DiseasesHeart AtriaDogsStroke VolumeFetal HeartHemodynamicsLateral VentriclesVentricular RemodelingEndocardiumDiastoleCerebral Ventricle NeoplasmsSystoleHeart SeptumHeart TransplantationMyocardial InfarctionCardiomyopathy, DilatedCardiomegalyCardiomyopathiesVentricular PressureHeart AneurysmPericardiumVentricular Function, RightElectrocardiographyCardiac VolumeTime FactorsModels, CardiovascularMyocardial IschemiaHeart ValvesHeart Function TestsMyocytes, CardiacCardiac Pacing, ArtificialBlood PressureAngiocardiographyCoronary CirculationHeart InjuriesCardiac CatheterizationVentricular Dysfunction, RightMitral ValveRats, WistarHypoplastic Left Heart SyndromeHeart BlockHeart Septal Defects, VentricularEchocardiography, DopplerTransposition of Great VesselsCardiotonic AgentsCardiac Surgical ProceduresDisease Models, AnimalHypertrophy, Right VentricularPerfusionCoronary DiseaseAtrial Function, LeftPapillary MusclesTreatment OutcomeRats, Sprague-DawleyEchocardiography, Doppler, ColorCardiac Output, LowInterview, PsychologicalCardiomyopathy, HypertrophicHeart RuptureHeart Arrest, InducedHeart-Assist DevicesHeart NeoplasmsCoronary VesselsMyocardial Reperfusion InjuryOrgan SizeCardiac OutputFollow-Up StudiesHeart Valve ProsthesisTachycardia, VentricularAortic Valve StenosisPulmonary ArteryEchocardiography, TransesophagealPacemaker, ArtificialTricuspid AtresiaMagnetic Resonance ImagingCoronary Vessel AnomaliesFibrosisMagnetic Resonance Imaging, CineAdrenergic beta-AntagonistsVentricular DysfunctionHydroxyethyl Starch DerivativesDouble Outlet Right VentricleProspective StudiesEchocardiography, Three-DimensionalBlood Flow Velocity