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Figure 2 Changes in acoustic intensity (AI) values from the left anterior descending (LAD) and left circumflex coronary artery (LCx) beds (denoted on the images in Fig. 1) following the injection of BR14 during maximal hyperemia. The LCx has a residual non-critical stenosis, whereas the LAD bed is normal. Although a flow mismatch is seen early after injection, AI in all viable tissue is similar at a later point in time, indicating redistribution. Where infarction had occurred a persistent perfusion defect remained. See text for details.