Abstract 15490: Prognostic Value and Accuracy of Vasodilator Stress Cardiac MRI and 320-Row Coronary CTA

Objective: To assess the prognostic value and accuracy of vasodilator stress cardiac MRI (CMR) and 320-row coronary CTA in patients with suspected coronary artery disease (CAD). Background: Vasodilator stress CMR detects ischemia, whereas coronary CTA detects atherosclerosis. The accuracy and prognostic value of these two state-of-the-art non-invasive imaging techniques is not known in the same subjects. Methods: We studied 151 consecutive subjects with suspected CAD and a predominantly intermediate pre-test disease risk prevalence. Vasodilator stress CMR was performed on a 1.5 Tesla scanner and was classified as normal or ischemic. CTA was performed on a 320-slice scanner and was classified as obstructive CAD (≥50% or unevaluable) or non-obstructive. The reference standard was quantitative invasive angiography and follow-up for major adverse cardiovascular events. Results: Subjects averaged 56±12 years and 60% were men. The median time between CTA and CMR examinations was 0 days (interquartile range 0-8 ...