Figure 2.

Example of radial motion waveforms. The global radial (a) in-slice velocities for two representative animals are shown, one post-MI and one sham. Note the distinct reduction in peak velocities in the diseased heart. Also, spatiotemporally resolved motion maps are displayed as colored plots (b-c) where the y-axis is circumferential position (i.e. segment; direction anteroseptal-anterior-lateral-posterior-posterioseptal), and x-axis is time after r-peak. Green color is positive radial motion (i.e. contraction), red is negative. The altered motion, especially in the anterolateral wall where the infarction is located, is clearly visible. Corresponding CMR magnitude images are shown (d,e), illustrating the location of myocardial thinning in the infarcted heart. The line denotes the first segment and counting direction.