Pranav Bhagirath

99 Left atrial sphericity: a promising parameter to predict response to ablation 14 4 7 0 2 4 6 8 10 12 14 16 < 0 0 - 1 > 1 patients % change in sphericity No recurrence Recurrence Figure 3. Correlation between post-index PVI change in sphericity and AF recurrence. Changes in LASP following the index ablation demonstrated a strong correlation with the probability of AF recurrence. All patients with increased LASP (negative remodeling) (blue bar) had AF-recurrence during the follow-up. Patients with a reduction in the LASP (positive remodeling) (orange bars) had no episodes of AF during the follow-up. 83.58 79.38 83.1 87.1 85.02 77.38 84.46 85.28 72 74 76 78 80 82 84 86 88 Paroxysmal (+) Paroxysmal (-) Persistent (+) Persistent (-) % sphericity Type of AF Pre-procedural Post-procedural Figure 4. Differences in LASP for paroxysmal and persistent AF. The nature of AF compared to the left atrial sphericity (LASP). (-) indicates no AF recurrence; (+), recurrence. Patients with recurrence showed an increase of the LASP after the index procedure.