RT Journal Article SR Electronic T1 Permanent pacing after cardiac transplantation JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 590 OP 590 DO 10.1136/hrt.70.6.590 VO 70 IS 6 A1 Gottfried Heinz YR 1993 UL http://heart.bmj.com/content/70/6/590.1.abstract AB