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Background Ventricular tachycardia (VT) ablation is generally guided by invasive mapping of the left ventricle (LV) using electro-anatomical voltage mapping (EAM) to identify the VT substrate [1]. Late gadolinium enhancement (LGE) MRI allows excellent visualization of the scar. Heterogeneous area in LGE images has been shown to correlate with the VT substrate in animal models of VT. Retrospective studies in patients have also correlated the LGE signal enhancement to low voltage in EAM maps. However, current clinical EAM platform such as the Carto3 (Biosense Webster) does not allow integration of LGE images for facilitating the VT ablation. In this study, we described a workflow to integrate scar geometry extracted from highresolution 3D LGE images with EAM.

journal of cardiovascular magnetic resonance

Feasibility of real time integration of high-resolution scar images with invasive electrograms in electro-anatomical mapping system in patients undergoing ventricular tachycardia ablation