Key result
Fusion of 3D MDCT images with electrical maps revealed that 5.4% to 17% of ablation points were located inside the left superior pulmonary vein ostia.
Why the study?
Does the fusion of MDCT images and electrical maps allow for the validation of left atrium ablation points in patients undergoing atrial fibrillation ablation?
Observational (n=8)
Does the fusion of MDCT images and electrical maps allow for the validation of left atrium ablation points in patients undergoing atrial fibrillation ablation?
Fusion of MDCT and electrical maps enables precise localization of ablation points, highlighting the area between the LSPV ostium and LAA as potentially critical during AF ablation.
May indicate inadvertent ablation inside LSPV ostia during AF procedures; leaves open whether MDCT-electrical fusion improves point validation or safety.
Aims of this study are: a) the three-dimensional (3D) reconstruction of the left atrium (LA) and pulmonary veins (PVs) and its fusion with LA electrical map (LAEM); b) the validation of the real positions of the PVs ablation points (APs). Eight patients underwent TAC 16 slices after PVs ablation for atrial fibrillation (AF). A marker-controlled “watershed segmentation” was developed for 3D LA reconstruction. LAEMs (CARTO) were registered on the 3D LA inner surface of the patients. On the “fusion maps”, we count offline the APs number inside the ostia of PVs. A percentage of 5,4% up to 17% of the total APs number was counted inside the left superior PV (LSPV) ostia and in particular on the anterior wall. A percentage of 4,5% up to 13,9% of the total APs number was counted inside the right inferior PV (RIPV) ostia. Fusion maps allow validating the position of the APs on a real map of LA. This study shows that the area between LSPV ostium and LAA could be the critical points during AF ablation.
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DELGRECO et al. (2005) conducted an observational in Atrial fibrillation (n=8). Fusion of electrical maps and MDCT images was evaluated on Percentage of ablation points inside the ostia of pulmonary veins. Fusion of 3D MDCT images with electrical maps revealed that 5.4% to 17% of ablation points were located inside the left superior pulmonary vein ostia.
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