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Convergent cannula was placed.VATS camera was then inserted. ablation of the posterior left atrial wall. convergent epi-sense system was then placed adjacent to the right superior pulmonary vein and suction was applied to the posterior left atrial wall. right inferior portion of the atrial wall and each ablation line was completed and carried laterally to the left-sided pulmonary veins. A total of 15 ablations to the left atrial wall were completed. a small pericardiotomy was created posterior to the phrenic nerve.The ligament of Marshall was then transected using the harmonic scalpel. The base of the left atrial appendage was approximately 40 mm. 40 mm clip was then placed over the appendage and positioned at the base and closed. TEE guidance, this confirmed full closure of the appendage. The clip was then released and the delivery device was removed.