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Mean of the 14 largest gaps in activation times during different durations of VF in each animal. The gap is expressed as the percent of the mean VF cycle length during that time interval. Each animal is represented by a different color. VF spontaneously terminated after 3 min in the animal represented by the black line and after 5 min in the animal represented by the blue line. A percent gap >60% (gray line) was considered VES.
