A. LA after removal of the tumor. The operative photograph shows the distal collateral vessel (white arrow) from CxA (after ligation). Endocardium of the LA remained in situ. LAA: Left atrial appendage. OS: Oblique sinus. B. Bovine pericardial patch (black arrow) was used for left atrial reconstruction. The suture was started from the left atrial roof. C-D. Pericardial patch was placed on the posterior wall of the LA using a polypropylene running suture.