RT Journal Article SR Electronic T1 Decreased heart rate variability in survivors of sudden cardiac death not associated with coronary artery disease. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 299 DO 10.1136/hrt.72.3.299 VO 72 IS 3 A1 J Singh A1 G Hart YR 1994 UL http://heart.bmj.com/content/72/3/299.abstract AB