Figure 6. Linear regression plots of repolarization time gradient (ΔRT) statistics including mean ΔRT (left), max ΔRT (middle) and std ΔRT (right) from both in vivo (blue) and ex vivo (red) data sets.

For all plots, there was no significant difference between regression fits for 5 in vivo and 9 ex vivo data sets (P>0.10). Data collected from 146 cardiac sequences. ECGI indicates electrocardiographic imaging; LAD, left anterior descending artery; and RT, repolarization time.