Tailoring the Ablative Strategy for Atrial Fibrillation: A State-of-the-Art Review

Figure 4

High-density mapping (12,275 points) performed with the 3D Precision System and HDGrid omnipolar catheter (Abbott) to research during atrial fibrillation of rotational activity (RA). The figure on the left shows a map during AF that allows identifying areas of interest compatible with rotational activity (cycle length mean map, CLmean), with activity between 120 and 300 msec. Areas of interest appear in sets of different colors, while insignificant areas appear as white and purple (below 120 msec and above 300 msec, respectively). On the right side, the figure shows the standard deviation map (SD map) of the same activity during AF (cycles length between 0 and 50 msec), in order to establish whether the rotational activity identified with the CLmean (at the level of the posterior wall near the left inferior pulmonary vein) is stable over time. The set of different colors indicates stable rotational activity in this region (SD between 0 and 50 msec).