Myocardial Perfusion ImagingTomography, Emission-Computed, Single-PhotonPerfusionTechnetium Tc 99m SestamibiCoronary CirculationThallium RadioisotopesDipyridamoleOrganotechnetium CompoundsPerfusion ImagingRadiopharmaceuticalsHeartExercise TestGated Blood-Pool ImagingCardiac-Gated Single-Photon Emission Computer-Assisted TomographyMyocardial IschemiaThalliumCoronary AngiographyCoronary DiseaseContrast MediaNitrogen RadioisotopesAdenosineRubidium RadioisotopesCoronary Artery DiseaseOrganophosphorus CompoundsSensitivity and SpecificityTomography, Emission-ComputedVasodilator AgentsMyocardial InfarctionOximesMyocardial ReperfusionCoronary VesselsReproducibility of ResultsVentriculography, First-PassElectrocardiographyPredictive Value of TestsEchocardiographyImage Interpretation, Computer-AssistedRadionuclide AngiographyImage EnhancementArtifactsImage Processing, Computer-AssistedVentricular Dysfunction, LeftCoronary StenosisVentricular Function, LeftDobutamineMyocardiumRadioisotopesVentilation-Perfusion RatioMicrocirculationPositron-Emission TomographyFeasibility StudiesGadolinium DTPAAngina PectorisTomography, X-Ray ComputedFractional Flow Reserve, MyocardialEchocardiography, StressMicrovascular AnginaStroke VolumeDogsTime FactorsMagnetic Resonance AngiographyMagnetic Resonance ImagingRadionuclide ImagingHyperemiaHemodynamicsMicrospheresFluorocarbonsBlood Flow VelocityChest PainTechnetium Tc 99m ExametazimeTechnetiumRegional Blood FlowObserver VariationProspective StudiesCerebrovascular CirculationMyocardial StunningRestChemotherapy, Cancer, Regional PerfusionMyocardial RevascularizationTechnetium Tc 99m Aggregated AlbuminPulmonary EmbolismPrognosisDiatrizoate MeglumineSeverity of Illness IndexMyocardial ContractionPhantoms, ImagingHeart DiseasesAngioplasty, Balloon, CoronaryTissue SurvivalHeart VentriclesAlgorithmsFollow-Up StudiesCollateral CirculationXenon RadioisotopesROC CurveInjections, Intra-ArterialMagnetic Resonance Imaging, CineRisk AssessmentGamma CamerasBundle-Branch Block