Skip to main content
. Author manuscript; available in PMC: 2023 Mar 3.
Published in final edited form as: Circ Arrhythm Electrophysiol. 2022 Mar 3;15(3):e010630. doi: 10.1161/CIRCEP.121.010630

Figure 7: Statistical summary of arrhythmia dynamics.

Figure 7:

A: Dominant frequency was not statistically different between epicardium and endocardium. B: Regularity index was higher in the endocardium (p = 0.0026, paired t test). C: Organization index was higher in the endocardium (p = 0.0058, paired t test) suggesting that the arrhythmic wavefronts were more regular and organized in the endocardium in comparison with the epicardium. D: Number of wavefronts per unit area per unit time were higher in the epicardium (p = 0.0003, paired t test). E: Average size of the wavefronts was larger in the epicardium (p = 0.0034, paired t test). F: Average duration of the wavefronts was longer in the endocardium (p = 0.0001, paired t test). G: Percentage of wavefronts that terminated with collisions was not statistically different between the two surfaces. H: Percentage of wavefronts that terminated with fractionations (wavefront splitting into two or more wavefronts) was higher in the epicardium (p = 0.0174, paired t test). I: Percentage of wavefronts that were unique (multiplicity) was not statistically different between the two surfaces. J: Percentage of wavefronts that repeated their trajectories (repeatability) was not statistically different between the two surfaces. K: Number of PS per unit area per unit time was not statistically different between epicardium and endocardium. L: Average duration of PS was longer in the endocardium in comparison with epicardium (p < 0.0001, paired t test). M: Average path length of the PS trajectory was longer in the epicardium (p = 0.0093, paired t test). N: Average distance traveled by the PS was smaller in the endocardium in comparison with epicardium (p = 0.0286, paired t test) suggesting that the PS was more spatially stable. O: The temporal sequences of arrhythmic wavefronts were more dissimilar than that of paced wavefronts as expected. P: There was weak positive spatio-temporal autocorrelation between epicardial and endocardial wavefronts and PS. Epicardial and endocardial local DF was more spatially correlated relative to local RI and local OI.