Enhanced Detection of Ischemic but Viable Myocardium by the Reinjection of Thallium after Stress-Redistribution Imaging

Abstract

The identification of ischemic but viable myocardium by thallium exercise scintigraphy is often imprecise, since many of the perfusion defects that develop in ischemic myocardium during exercise do not "fill in" on subsequent redistribution images. We hypothesized that a second injection of thallium given after the redistribution images were taken might improve the detection of ischemic but viable myocardium.