Tomography, X-Ray ComputedHeartPositron-Emission TomographyHeart RateTomographyTomography, Emission-ComputedTomography, Optical CoherenceTomography, Emission-Computed, Single-PhotonTomography, Spiral ComputedFluorodeoxyglucose F18Heart FailureTomography, OpticalMultidetector Computed TomographyHeart DiseasesCone-Beam Computed TomographyElectron Microscope TomographyOtoacoustic Emissions, SpontaneousHeart TransplantationHeart Defects, CongenitalTomography, X-RayFluorine RadioisotopesFetal HeartVehicle EmissionsRadiopharmaceuticalsTomography Scanners, X-Ray ComputedSensitivity and SpecificityHeart ValvesMultimodal ImagingImaging, Three-DimensionalHeart AtriaTime FactorsImage Processing, Computer-AssistedMagnetic Resonance ImagingReproducibility of ResultsMyocardiumPredictive Value of TestsProspective StudiesHeart BlockCarbon RadioisotopesBrainTreatment OutcomeMyocardial IschemiaCoronary DiseaseRetrospective StudiesHeart Function TestsDiagnostic ImagingPhantoms, ImagingMyocardial ContractionFollow-Up StudiesGreenhouse EffectHeart Arrest, InducedSpectrometry, FluorescenceCerebrovascular CirculationHemodynamicsX-Ray MicrotomographyMyocardial InfarctionEchocardiographyVentricular Function, LeftRadiographic Image Interpretation, Computer-AssistedRisk FactorsOrganotechnetium CompoundsAlgorithmsMyocytes, CardiacAir PollutantsCarbon FootprintThallium RadioisotopesPrognosisExercise TestPerfusionTissue DistributionVentricular Dysfunction, LeftStroke VolumeImage EnhancementEquipment DesignDogsCalcinosisMethaneNitrogen RadioisotopesCardiomyopathiesContrast MediaSeverity of Illness IndexCardiomyopathy, DilatedCardiac Output, LowTechnetium Tc 99m SestamibiFour-Dimensional Computed TomographyReference ValuesDisease Models, AnimalArtifactsRadiography, ThoracicOxygen ConsumptionCopper RadioisotopesCardiotonic AgentsRadioactive TracersRadiographic Image EnhancementRacloprideHeart InjuriesCoronary AngiographyFluorescent DyesFeasibility StudiesDeoxyglucose