MYOCARDIAL SPECT AND LEFT-VENTRICULAR PERFORMANCE STUDY USING A SINGLE TC-99M TEBOROXIME INJECTION - COMPARISON WITH TL-201 MYOCARDIAL SPECT

Myocardial SPECT using teboroxime was compared to thallium SPECT in 26 patients undergoing cardiac catheterization. Agreement between thalli um SPECT and teboroxime SPECT for the identification of myocardial seg ments was 209/235 (89%). A significant correlation was found in 15 pat ients between the left ventricular ejection fraction by teboroxime fir st-pass study and the ejection fraction by contrast ventriculography. In nine patients with myocardial infarction and/or multivessel coronar y artery disease, the ejection fraction revealed a mean decrease from 0.52 at rest to 0.46 at exercise. Teboroxime makes it possible to perf orm an exercise first-pass study of left ventricular ejection fraction followed by myocardial perfusion imaging.