RT Journal Article SR Electronic T1 The author’s reply: JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 229 OP 229 DO 10.1136/hrt.2007.134742 VO 94 IS 2 A1 Martin O’Flaherty YR 2008 UL http://heart.bmj.com/content/94/2/229.2.abstract AB