Magnetic Resonance Imaging, CineCerebral AqueductRespiratory-Gated Imaging TechniquesMagnetic Resonance ImagingCardiac-Gated Imaging TechniquesArtifactsMagnetic Resonance SpectroscopyImage Interpretation, Computer-AssistedMagnetic Resonance AngiographyBreath HoldingContrast MediaMyocytes, CardiacImage EnhancementGadolinium DTPAHeartReproducibility of ResultsImaging, Three-DimensionalImage Processing, Computer-AssistedCardiac OutputGadoliniumSensitivity and SpecificityBrainDiffusion Magnetic Resonance ImagingMotion Pictures as TopicVentricular Function, LeftMyocardial ContractionHeart VentriclesPredictive Value of TestsMyocardiumEdema, CardiacTomography, X-Ray ComputedTime FactorsStroke VolumeCardiac Surgical ProceduresNuclear Magnetic Resonance, BiomolecularArrhythmias, CardiacBrain MappingObserver VariationDeath, Sudden, CardiacAlgorithmsPhantoms, ImagingCardiac CatheterizationVentricular Dysfunction, LeftSurface Plasmon ResonanceCardiomyopathiesCineradiographyMyocardial InfarctionCardiac VolumeElectron Spin Resonance SpectroscopyTorsion, MechanicalProspective StudiesThird VentricleFeasibility StudiesEchocardiographyMagnetic Resonance Imaging, InterventionalCineangiographyHeart DiseasesElectrocardiographyEcho-Planar ImagingTreatment OutcomeOrganometallic CompoundsVentricular Function, RightFluorescence Resonance Energy TransferHeart Defects, CongenitalCardiac Pacing, ArtificialVentricular RemodelingCardiomegalyOxygenMotionCardiac TamponadeHealthy VolunteersHemodynamicsCardiac Imaging TechniquesMyocardial Perfusion ImagingCoronary CirculationModels, CardiovascularFollow-Up StudiesCreatineVentriculostomyCholangiopancreatography, Magnetic ResonanceRetrospective StudiesForamen MagnumReference ValuesProtonsDisease Models, AnimalArachnoid CystsMyocardial IschemiaDogsSeverity of Illness IndexHeart Arrest