RT Journal Article SR Electronic T1 Detection of Obstructive Coronary Artery Disease Using Regadenoson Stress and 82Rb PET/CT Myocardial Perfusion Imaging JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1748 OP 1754 DO 10.2967/jnumed.113.120063 VO 54 IS 10 A1 Edward Hsiao A1 Bilal Ali A1 Ron Blankstein A1 Hicham Skali A1 Towhid Ali A1 John Bruyere, Jr. A1 Raymond Y. Kwong A1 Marcelo F. Di Carli A1 Sharmila Dorbala YR 2013 UL http://jnm.snmjournals.org/content/54/10/1748.abstract AB Our objective was to study the diagnostic performance of regadenoson 82Rb myocardial perfusion PET imaging to detect obstructive coronary artery disease (CAD). Methods: We studied 134 patients (mean age, 63 ± 12 y; mean body mass index, 31 ± 9 kg/m2) without known CAD (96 with coronary angiography and 38 with low pretest likelihood of CAD). Stress left ventricular ejection fraction (LVEF) minus rest LVEF defined LVEF reserve. The Duke score was used to estimate the anatomic extent of jeopardized myocardium. Results: Regadenoson PET had a high sensitivity, 92% (95% confidence interval [CI], 83%–97%), in detecting obstructive CAD, with a normalcy rate of 97% (95% CI, 86%–99%), specificity of 77% (54/70 patients; 95% CI, 66%–86%), and area under the receiver-operator-characteristic curve of 0.847 (95% CI, 0.774–0.903; P < 0.001). Regadenoson PET demonstrated high sensitivity to detect CAD in patients with single-vessel CAD (89%; 95% CI, 70%–98%). The mean LVEF reserve was significantly higher in patients with normal myocardial perfusion imaging results (6.5% ± 5.4%) than in those with mild (4.3 ± 5.1, P = 0.03) and moderate to severe reversible defects (−0.2% ± 8.4%, P = 0.001). Also, mean LVEF reserve was significantly higher in patients with a low likelihood of CAD (7.2% ± 4.5%, P < 0.0001) and mild or moderate jeopardized myocardium than in those with significant jeopardized myocardium (score ≥ 6), −2.8% ± 8.3%. Conclusion: Regadenoson 82Rb myocardial perfusion imaging is accurate for the detection of obstructive CAD. LVEF reserve is high in patients without significant ischemia or significant angiographic jeopardized myocardium.