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Results 37 patients (26 males, mean age = 63±10.12 years) were included in this study. Six patients underwent an ablation using PVAC catheter, SRF catheter was used in 14 patients, and 17 patients underwent a cryoballoon ablation. Pre-ablation LATR was comparable in all three cohorts (Figure 1). Extent of scar tissue was higher in Cryo and SRF patients compared to PVAC patients (Figure1). Overall six patients were found to have AF recurrence at 3-months follow-up. Patients with recurrence had a significantly lower amount of ablation lesions than patients in sinus rhythm (5.93% vs. 15.98%; P=0,004; Figure 2). 3-dimensional visualization allows comparison of induced lesions by different ablation catheters (Figure 3). Conclusions From our preliminary results, PVAC ablation appears to result in lesser scar formation as compared to Cryo and SRF ablation. The greater recurrence in patients with low scar post-ablation suggests the need to implement an adequate ablation strategy that results in greater scar to maximize successful outcomes. DE-MRI is an appropriate method to compare lesion formation induced by different ablations strategies.

journal of cardiovascular magnetic resonance

DE-MRI allows comparison of lesion formation after pulmonary vein isolation with different ablation catheters in patients with paroxysmal atrial fibrillation