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a Transthoracic four chamber echocardiogram showing the aneurysmal left atrial appendage with compressive effect on left ventricle, b Transoesophageal echocardiogram obtained at mid-oesophageal level in 60° showing the left atrial appendage aneurysm, c Intraoperative image showing the resected left atrial appendage aneurysm, LA left atrium, LAA left atrial appendage, LV left ventricle, RA right atrium, RV right ventricle
