ThalliumThallium RadioisotopesFerrocyanidesRadioisotopesTomography, Emission-Computed, Single-PhotonDipyridamoleExercise TestHeartCoronary DiseaseAntidotesAlopeciaRodenticidesRadionuclide VentriculographyPoisoningGated Blood-Pool ImagingIodobenzenesOrganotechnetium CompoundsDobutamineCoronary AngiographyCoronary CirculationTomography, Emission-ComputedRadionuclide ImagingGalliumMolecular StructurePotassium RadioisotopesAngina PectorisElectrocardiographySensitivity and SpecificitySulfur CompoundsOlfactory Nerve InjuriesMyocardial Stunning