RT Journal Article SR Electronic T1 Artefactual occlusion of the left subclavian artery during graft angiography JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1335 OP 1335 DO 10.1136/heart.89.11.1335-a VO 89 IS 11 A1 N E J West A1 A J Dixon A1 P N Ruygrok YR 2003 UL http://heart.bmj.com/content/89/11/1335.2.abstract AB