RT Journal Article SR Electronic T1 Echocardiographic findings of floating thrombus in left atrium. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 599 OP 601 DO 10.1136/hrt.44.5.599 VO 44 IS 5 A1 K Furukawa A1 H Katsume A1 H Matsukubo A1 D Inoue YR 1980 UL http://heart.bmj.com/content/44/5/599.abstract AB We describe the M-mode and two-dimensional echocardiographic findings of a floating thrombus in the left atrium. Though the features resembled those of pedunculated left atrial myxoma, two-dimensional echocardiography was helpful in differentiating between thrombus and myxoma in the left atrium.