Echocardiography, StressMyocardial Perfusion ImagingEchocardiographyDobutamineTomography, Emission-Computed, Single-PhotonDipyridamoleExercise TestCardiotonic AgentsCoronary CirculationTechnetium Tc 99m SestamibiEchocardiography, DopplerEchocardiography, TransesophagealEchocardiography, Three-DimensionalMyocardial IschemiaPerfusionCoronary AngiographyCoronary DiseaseSensitivity and SpecificityVentricular Dysfunction, LeftThallium RadioisotopesVentricular Function, LeftPredictive Value of TestsEchocardiography, Doppler, ColorCoronary Artery DiseaseHeartFeasibility StudiesElectrocardiographyRadiopharmaceuticalsOrganotechnetium CompoundsContrast MediaStroke VolumeVasodilator AgentsObserver VariationTissue SurvivalMyocardial InfarctionEchocardiography, Doppler, PulsedMyocardial ContractionAtropineCardiac-Gated Single-Photon Emission Computer-Assisted TomographyGated Blood-Pool ImagingReproducibility of ResultsPerfusion ImagingHeart DiseasesChest PainProspective StudiesPrognosisFractional Flow Reserve, MyocardialMyocardial StunningHemodynamicsHeart VentriclesAdenosineMyocardial ReperfusionFollow-Up StudiesCoronary StenosisRubidium RadioisotopesImage EnhancementRisk AssessmentImage Interpretation, Computer-AssistedThalliumOrganophosphorus CompoundsMyocardial RevascularizationSystoleMyocardiumCardiac CatheterizationCoronary VesselsNitrogen RadioisotopesFluorocarbonsImage Processing, Computer-AssistedAngina PectorisTime FactorsDiastoleBlood Flow VelocityMitral ValveHeart RateSeverity of Illness IndexMitral Valve InsufficiencyTomography, Emission-ComputedArtifactsRestVentriculography, First-PassRadionuclide VentriculographyROC CurveCardiomyopathy, DilatedDiatrizoate MeglumineHeart AtriaParasympatholyticsHeart Function TestsSulfur HexafluorideRisk FactorsHypertrophy, Left VentricularHeart Valve DiseasesTreatment OutcomeAortic Valve StenosisBlood PressureSympathomimeticsPositron-Emission TomographyChi-Square DistributionRetrospective StudiesMicrocirculationTomography, X-Ray Computed