Fig. 5.

a: Schematics illustrating the partitioning of the left ventricle six regions of interest for the basal/midventricular slice and four regions of interest for the apical slice. Bull's eye plots for (b) radial and (c) longitudinal velocities obtained at peak systole (as defined by the maximum velocities during systole) according to the American Heart Association 16-segment model. b′,c′: Corresponding velocities at peak diastole (as identified by the minimum velocities during diastole). The colors encode the average over all animals, and the numbers correspond to mean ± SD. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]