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Figure 3 This figure shows a representative MCE case demonstrating the progressive changes in videointensity observed within the risk area during coronary occlusion and reperfusion. a, The contrast-enhanced LV short axis at baseline. The infusion of the contrast agent and the ECG-gated harmonic imaging yielded uniform myocardial opacification with no attenuation of the posterior wall. b, The risk area is delineated by absent contrast enhancement during LAD occlusion (between arrows). c, Five min after the release of the coronary occlusion, an increase in videointensity is noted within the postischemic myocardium, which correlated with the hyperemic flow detected by microspheres. d, e, and f, The MCE images acquired at 30, 90, and 180 min of reperfusion, respectively. A clear progressive reduction in videointensity can be observed within the risk area.