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Figure 3 (A) Left ventricular voltage map in an infarct animal in which three percutaneous catheter-based injections of iron-loaded myogenic precursor cells (MPC) were performed into locally damaged myocardium (one in the center and two at the periphery, black dots). (B) Corresponding magnetic resonance imaging 90 min after MPC implantation (long axis black-blood T2 turbo spin echo imaging, upper panel; inversion-recovery true-fisp in the same view, lower panel) showing three sites of injection (arrows) into hyperenhanced damaged tissue with nice anatomical agreement. (C) Corresponding hematoxylin (upper panel) and Perls stain (lower panel) of implanted iron-loaded MPC (arrows) into ischemic myocardium (x100).