RT Journal Article SR Electronic T1 Early surgery versus watchful waiting for asymptomatic severe aortic valve stenosis: a hot topic for the past 20 years JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 258 OP 259 DO 10.1136/heartjnl-2016-310399 VO 103 IS 4 A1 Sylvestre Marechaux A1 Christophe Tribouilloy YR 2017 UL http://heart.bmj.com/content/103/4/258.abstract AB