RT Journal Article SR Electronic T1 Atrial flutter and thromboembolic risk JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1444 OP 1445 DO 10.1136/heartjnl-2015-307974 VO 101 IS 18 A1 Susan S Kim A1 Bradley P Knight YR 2015 UL http://heart.bmj.com/content/101/18/1444.abstract AB