Table 2. Pearson correlations between FT duration and FT composition metrics for the ALT_fast and ALT_slow simulations and the difference in ALT_fast and ALT_slow correlations (Δr) during fast pacing (270-ms to 250-ms CL).

	ALTfast	ALTslow	Δr
Number of Filaments	0.61 [0.48 0.74]	0.70 [0.64 0.75]	−0.08 [−0.22 0.05]
Mean Filament Duration	0.37 [0.27 0.51]	0.34 [0.29 0.43]	0.03 [−0.11 0.18]
Maximum Filament Duration	0.96 [0.92 0.98]	0.83 [0.80 0.89]	0.13 [0.06 0.17]
Sum of Filament Durations	0.92 [0.87 0.96]	0.95 [0.93 0.96]	−0.03 [−0.08 0.02]

Confidence intervals at 95% shown in brackets.