2005 Volume 3 Issue 2 Pages 91-92
A giant ball-thrombus was found in the left atrium in 78 year-old female with non-valvular lone atrial fibrillation. Intraoperative echocardiography revealed the thrombus was floating freely inside the left atrium. The thrombus was sometimes scarcely entrapped into the mitral annulus and bounded back toward the left atrium. The removed thrombus was 45×35×20mm in size.