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Value of Interatrial Block for the Prediction of Silent Ischemic Brain Lesions

AIMS Pulmonary vein isolation (PVI) can be accomplished using radiofrequency (RF) or second generation cryoballoon (CB2). We aimed to compare the rate of freedom of very late recurrence (VLR) defined as recurrence beyond one year in patients who were AF-free during the first post-procedural year after PVI using CB2 or RF. METHODS Consecutive patients who underwent PVI by RF or CB2 ablation between August 2014 and December 2015 were included in our study. The primary endpoint was the occurrence of VLR in follow-up after 12 months. Patients who experienced recurrence between the first 3 to 12 months after PVI and those who did not complete 15-month follow-up time were excluded. RESULTS 139 patients were included: 68 underwent PVI by CB2 and 71 using RF. The global rate of VLR was of 22.15%. The rate of freedom of VLR beyond 12-month follow-up was of 84.5% (57 patients) for the CB2 group vs. 71% (50 patients) in the RF group (p=0.037). 15 patients underwent re-ablation (11 of the RF group and 4 of the CB2 group): all of the patients who had undergone PVI by RF in the index procedure were found to have vein reconnection, whereas none of the CB2 group had reconnected veins (3 cavotricuspid isthmus and 1 mitral isthmus). CONCLUSION In patients free of recurrence during the first post-procedural year after pulmonary vein isolation for the treatment of paroxysmal atrial fibrillation: second generation cryoballoon ablation showed a significantly lower rate of very late recurrence compared to radiofrequency ablation.

Credits: Goksel Cinier, Ahmet Ilker Tekkesin, Tugba Yanar Çelik, Özlem Mercan, Halil Ibrahim Tanboga, Muhammed Burak Günay, Ceyhan Türkkan, Mert Ilker Hayiroglu, Bryce Alexander, Ahmet Taha Alper, Adrian Baranchuk

Biosense Webster
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Introduction to AFib
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