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Atrial fibrillation (AF) vulnerability and mean AF duration after drug treatment. A, AF vulnerability presented as the mean number of burst-pacings required to induce an AF episode of ≥15 minutes. B, AF duration is presented in box plots and whiskers represent minimum to maximum values. In the dofetilide procedures n = 6, in the ranolazine procedures n = 7 and in the combination procedures n = 7. * P < 0.05; ns = nonsignificant.
