Figure 5

Radial motion of a Group1 patient. A slice from the midcavity is shown in systole and diastole, before and after CRT. In systole before CRT, the arrows indicate the septal and lateral walls. It can be noticed that in the septal wall, pixels present positive values—blue color—while in the lateral wall they present negative values—red color. The expected normal movement would be an overall contraction of the walls, represented by red color. Such movement can be seen in systole after CRT. The arrows in the figure indicate the global contraction movement depicted in tones of reds. The color scale is shown at the top right of the figure.