Fig. 1. MVO within infarcted myocardium on LGE image, native T1 map, and post-contrast T1 map.

A. On LGE image, MVO is observed as hypo-enhanced region within hyper-enhanced infarcted myocardium. B. On native T1 map, MVO is distinguished as dark region within bright infarcted myocardium. C. On post-contrast T1 map, MVO is identified as bright region within dark infarcted myocardium. Regions of interest, in which T1 values were measured in (B) and (C), were outlined with circles in infarcted and remote myocardium and with contour of MVO. LGE = late gadolinium enhancement, MVO = microvascular obstruction