ThalliumThallium RadioisotopesFerrocyanidesRadioisotopesTomography, Emission-Computed, Single-PhotonDipyridamoleExercise TestCoronary DiseaseHeartAntidotesAlopeciaRodenticidesRadionuclide VentriculographyPoisoningGated Blood-Pool ImagingIodobenzenesDobutamineOrganotechnetium CompoundsCoronary AngiographyCoronary CirculationAngina PectorisTomography, Emission-ComputedRadionuclide ImagingGalliumElectrocardiographyPotassium RadioisotopesSensitivity and SpecificityOlfactory Nerve InjuriesMyocardial Stunning