RT Journal Article SR Electronic T1 Pitfall in the diagnosis of pericardial effusion by echocardiography JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 613 OP 613 DO 10.1136/hrt.82.5.613 VO 82 IS 5 A1 J AUER A1 R BERENT A1 B EBER YR 1999 UL http://heart.bmj.com/content/82/5/613.abstract AB