Spatial stability
Spatial stability was assessed by correlating the frequency of
propagation patterns (LIA, LRA and FF) at each vertex of the chamber
anatomy over 2 separate 30s recordings taken at baseline prior to any
ablation. The value for the number of pattern occurrences were plotted
for each vertex of the anatomy for each recording. A linear best fit
line was plotted, and R2 calculated to assess the
strength of the linear correlation between the two mapping segments.
Stability of regions with the most repetitive patterns identified using
the 30% threshold value for each 30s map were compared using Cohen’s
kappa statistic.