Ventricular Function, LeftHeart VentriclesCerebral VentriclesVentricular FunctionVentricular Dysfunction, LeftMyocardiumHeartThird VentricleFourth VentricleMyocardial ContractionEchocardiographyHypertrophy, Left VentricularLateral VentriclesDogsCerebral Ventricle NeoplasmsEndocardiumStroke VolumeVentricular RemodelingDiastoleHemodynamicsPericardiumSystoleElectrocardiographyHeart AneurysmVentricular Function, RightHeart AtriaHeart SeptumCardiac VolumeVentricular PressureMyocardial InfarctionHeart FailureCardiomyopathy, DilatedBlood PressureCardiomegalyCardiomyopathiesCoronary CirculationModels, CardiovascularAngiocardiographyHeart Defects, CongenitalMitral ValveCardiac Pacing, ArtificialTime FactorsTransposition of Great VesselsVentricular Dysfunction, RightCardiac CatheterizationHeart RateFistulaFetal HeartHeart Conduction SystemAtrial Function, LeftHypertrophy, Right VentricularMyocardial IschemiaEchocardiography, DopplerCoronary VesselsMyocytes, CardiacPapillary MusclesEchocardiography, Doppler, ColorHeart Septal Defects, VentricularOrgan SizeCardiac OutputRats, WistarHeart RuptureCardiac Surgical ProceduresHeart DiseasesHeart InjuriesHypoplastic Left Heart SyndromeCardiomyopathy, HypertrophicHeart Function TestsDisease Models, AnimalTricuspid AtresiaEchocardiography, TransesophagealCoronary Vessel AnomaliesAortic Valve StenosisDouble Outlet Right VentricleTreatment OutcomeCineangiographyGated Blood-Pool ImagingMagnetic Resonance ImagingPulmonary ArteryHeart-Assist DevicesTachycardia, VentricularMagnetic Resonance Imaging, CineRats, Sprague-DawleyVentricular SeptumEchocardiography, Three-DimensionalCardiotonic AgentsPacemaker, ArtificialMitral Valve InsufficiencyTricuspid ValveArrhythmias, CardiacHeart NeoplasmsBlood Flow VelocityHypertensionEndocardial FibroelastosisEndomyocardial FibrosisPerfusionHydrocephalusAortic ValveChordae TendineaeAtrial Function