Selective left coronary angiography demonstrating normal left anterior descending (LAD) and left circumflex arteries and their branches (A). Selective left coronary angiography demonstrating normal left anterior descending (LAD) and left circumflex arteries and their branches (A). Coronary reactivity testing performed with the Volcano FloWire in the mid-LAD (arrow; B) demonstrated abnormal coronary flow reserve consistent with microvascular coronary dysfunction. PAVEL GOYKHMAN et al. J Rheumatol 2012;39:448-450 ©2012 by The Journal of Rheumatology