ThalliumThallium RadioisotopesFerrocyanidesRadioisotopesTomography, Emission-Computed, Single-PhotonDipyridamoleExercise TestToxicity TestsHeartCoronary DiseaseAntidotesAlopeciaRodenticidesPoisoningRadionuclide VentriculographyToxicity Tests, AcuteGated Blood-Pool ImagingIodobenzenesDobutamineOrganotechnetium CompoundsCoronary AngiographyCoronary CirculationTomography, Emission-ComputedRadionuclide ImagingGalliumElectrocardiographyPotassium RadioisotopesAngina PectorisOlfactory Nerve InjuriesMyocardial StunningParesthesiaSensitivity and Specificity