RT Journal Article SR Electronic T1 A pacemaker reduced the recurrence of syncope in patients with severe vasovagal syncope JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 154 OP 154 DO 10.1136/ebm.1999.4.154 VO 4 IS 5 YR 1999 UL http://ebm.bmj.com/content/4/5/154.abstract AB