RT Journal Article SR Electronic T1 Heartbeat: Predictors of left atrial thrombus in patient with atrial fibrillation JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1293 OP 1294 DO 10.1136/heartjnl-2019-315683 VO 105 IS 17 A1 Catherine M Otto YR 2019 UL http://heart.bmj.com/content/105/17/1293.abstract AB