RT Journal Article SR Electronic T1 P: the neglected deflection JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 389 OP 389 DO 10.1136/hrt.2009.185918 VO 96 IS 5 A1 D H Spodick YR 2010 UL http://heart.bmj.com/content/96/5/389.1.abstract AB