RT Journal Article SR Electronic T1 An unusual (subcarinal) case of pulmonary artery sling JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 457 OP 457 DO 10.1136/heart.85.4.457 VO 85 IS 4 A1 FRAISSE, A A1 DAOU, L A1 BONHOEFFER, P YR 2001 UL http://heart.bmj.com/content/85/4/457.abstract AB