Superolateral Mitral Line
This ablation line is less commonly used and extends from the posterior base of the LAA orifice adjacent to the LSPV to the mitral annulus and has been associated with high rates of successful transmural block without the need for CS ablation, likely due to the CS myocardial sleeve terminating more medially.34 Additionally, it may also interrupt epicardial connections within the ligament of Marshall.34 However, the thin atrial myocardium over the superolateral aspect of the LAA increases the risk of cardiac tamponade.34