Patient Disposition Flow Chart: A total of 42 patients were enrolled in the study. and retrospectively divided into two groups. In the first group (n=26), Translational Phase, MPT therapy was not delivered until at least 120 seconds post AF induction. Of the 26 patients 13 patients were excluded due to incomplete waveform data and 1 because AF was not able to be induced and MPT was not delivered resulting in 12 patients in this group. In the second group (n=16), Efficacy Phase, MPT therapy was not delivered until at least 15 seconds post AF induction. Of the 16 consecutive patients in the Efficacy Phase, 2 were excluded from the analysis due to AF refractory to transthoracic cardioversion and because of the lack waveform data.