FIGURE LEGENDS
Figure 1. Example QTp/TpQ plots for 4 patients .
A. Control patient with low R2I2 and Low PERS. B. Control patient with low R2I2 and high PERS. C. Non-ischemic cardiomyopathy (N-ICM) patient with low R2I2 and low PERS. D. Non-ischemic cardiomyopathy patient with high R2I2 and high PERS.
For each example patient the 12 ECG leads have separate lines colour coded by ECG region. The lines are drawn point-to-point rather than as gradients to allow differentiation of the ECG leads (see online supplementary file for a gradient plot example). R2I2 is higher in the patients whose ECG leads follow dissonant QTp/TpQ paths. PERS reflects the steepest restitution curve gradient taken as a mean for all 12 ECG leads; moderately high PERS values may be seen in control patients.