RT Journal Article SR Electronic T1 Pacemaker lead fracture JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 783 OP 783 DO 10.1136/heart.89.7.783 VO 89 IS 7 A1 A Saha A1 J Tan A1 B Prendergast YR 2003 UL http://heart.bmj.com/content/89/7/783.abstract AB