Fig. 2. Three-vessel disease in 70-year-old man.

Ring-like subendocardial perfusion defect (arrowheads) is seen on stress, and disappears on rest images (upper row). Differentiation from microvascular disease may be challenging. Patient had multifocal severe stenosis (arrowheads) at left anterior descending and left circumflex coronary arteries. Right coronary artery angiogram (on right lower) shows total occlusion (arrow) at proximal segment, and distal segment (arrow) reconstituted via big septal branch is seen on left coronary angiogram (on left lower) (Courtesy of Sung-A Chang, Samsung Medical Center).