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Figure 3 A typical example of acute ischemic changes in regional deformation. Radial deformation: strain profiles obtained before occlusion (baseline), 30 to 60 s after occlusion (occlusion) of the right coronary artery, and 2 min after balloon deflation (reperfusion) from the "at-risk" posterior basal segment with visually normal preocclusion wall motion (a) or abnormal wall motion (b). Longitudinal deformation: strain profiles obtained before occlusion, 30 to 60 s after occlusion of the left anterior descending coronary artery, and 2 min after balloon deflation from the "at-risk" septal apical segment with visually normal preocclusion wall motion (a) or abnormal visual wall motion (b). The timing of aortic valve closure (AVC) is represented by vertical dashed lines. The augmentation in postsystolic shortening during occlusion is indicated with black arrows.