RT Journal Article SR Electronic T1 Transoesophageal echocardiography imaging of a large left atrium thrombus: a two and a half year follow up JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1061 OP 1061 DO 10.1136/heart.89.9.1061 VO 89 IS 9 A1 D Chrissos A1 C Loupa A1 P Antonatos YR 2003 UL http://heart.bmj.com/content/89/9/1061.abstract AB