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