RT Journal Article SR Electronic T1 BALL-THROMBUS OF THE RIGHT ATRIUM JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 137 OP 139 DO 10.1136/hrt.18.1.137 VO 18 IS 1 A1 Eva Frommer YR 1956 UL http://heart.bmj.com/content/18/1/137.abstract AB