RT Journal Article SR Electronic T1 Heartbeat: Beta-blockers for aortic regurgitation JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 165 OP 167 DO 10.1136/heartjnl-2015-309186 VO 102 IS 3 A1 Otto, Catherine M YR 2016 UL http://heart.bmj.com/content/102/3/165.abstract AB