Usefulness of peak frequency in Electrograms for elimination of left atrial Posterior Wall residual potentials via Epicardial connections.

Left atrial posterior wall (LAPW) residual potentials via epicardial connections during LAPW isolation are often low-frequency continuous potentials. Accurate annotation of these residual potentials by three-dimensional electroanatomical mapping systems is challenging and can be misleading. Herein, we present a case of successful LAPW isolation using peak frequency analysis.