RT Journal Article SR Electronic T1 Anticoagulation in valvar heart disease: new aspects and management during non-cardiac surgery JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 567 OP 572 DO 10.1136/heart.84.5.567 VO 84 IS 5 A1 Gohlke-Bärwolf, Christa YR 2000 UL http://heart.bmj.com/content/84/5/567.abstract AB