Echocardiography, StressMyocardial Perfusion ImagingTomography, Emission-Computed, Single-PhotonEchocardiographyDobutamineExercise TestTechnetium Tc 99m SestamibiDipyridamoleCoronary CirculationThallium RadioisotopesMyocardial IschemiaCoronary AngiographyCardiotonic AgentsCoronary DiseasePredictive Value of TestsCoronary Artery DiseaseSensitivity and SpecificityEchocardiography, DopplerEchocardiography, TransesophagealEchocardiography, Three-DimensionalOrganotechnetium CompoundsPerfusionElectrocardiographyVasodilator AgentsHeartRadiopharmaceuticalsAdenosineVentricular Dysfunction, LeftVentricular Function, LeftEchocardiography, Doppler, ColorPrognosisOrganophosphorus CompoundsFeasibility StudiesRisk AssessmentReproducibility of ResultsCoronary StenosisContrast MediaStroke VolumeAsymptomatic DiseasesObserver VariationTissue SurvivalMyocardial InfarctionEchocardiography, Doppler, PulsedMyocardial ContractionFollow-Up StudiesAtropineCardiac-Gated Single-Photon Emission Computer-Assisted TomographyGated Blood-Pool ImagingPerfusion ImagingHeart DiseasesChest PainProspective StudiesSeverity of Illness IndexROC CurveFractional Flow Reserve, MyocardialMyocardial StunningHemodynamicsHeart VentriclesMyocardial ReperfusionRubidium RadioisotopesImage EnhancementImage Interpretation, Computer-AssistedThalliumRisk FactorsMyocardial RevascularizationSystoleMyocardiumCardiac CatheterizationCoronary VesselsNitrogen RadioisotopesFluorocarbonsImage Processing, Computer-AssistedAngina PectorisTime FactorsProportional Hazards ModelsDiastoleBlood Flow VelocityMitral ValveHeart RateMitral Valve InsufficiencyTomography, Emission-ComputedArtifactsRestVentriculography, First-PassRadionuclide VentriculographyCardiomyopathy, DilatedDiatrizoate MeglumineHeart AtriaParasympatholyticsHeart Function TestsSulfur HexafluorideHypertrophy, Left VentricularHeart Valve DiseasesTreatment OutcomeAortic Valve StenosisBlood PressureSympathomimeticsPositron-Emission TomographyChi-Square DistributionRetrospective Studies