RT Journal Article SR Electronic T1 Heart block in a young man JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1804 OP 1866 DO 10.1136/heartjnl-2020-317556 VO 106 IS 23 A1 Vickram Singh A1 Heather J Edwards A1 Fong T Leong YR 2020 UL http://heart.bmj.com/content/106/23/1804.abstract AB