Abstract 16854: An Ungated, Rapid Rest/Stress Myocardial Perfusion Protocol is Useful for Detection of Coronary Artery Disease in Patients With Atrial Fibrillation

Introduction: In patients with atrial fibrillation, the diagnostic accuracy of standard, gated stress/rest perfusion cardiovascular magnetic resonance (CMR) for detection of coronary artery (CAD) disease remains uncertain. Here we investigated using instead an ungated approach with no ECG gating with a rapid rest/stress perfusion protocol to determine its accuracy for detection of CAD in this patient population. To overcome the potential issue of peri-infarct ischemia with a rest-first sequence, we gave very little time between rest and stress perfusion scans. Methods: 23 patients with atrial fibrillation (68 ± 13 years, 13 males and 10 females) underwent a very rapid rest/regadenoson stress perfusion imaging protocol and X-Ray angiography in this study. An ungated radial myocardial perfusion sequence was used (TR/TE = 2.2/1.2 msec, 3T, 20 rays/slice, 5 slices after each saturation pulse, ~2х2х8 mm). Rest/stress protocol was performed in the following order: rest image acquisition (0.05 mmol/kg gadoterido...