RT Journal Article SR Electronic T1 Heart rate variability in children with hypertrophic cardiomyopathy JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 205 OP 206 DO 10.1136/heart.89.2.205 VO 89 IS 2 A1 Butera, G A1 Bonnet, D A1 Kachaner, J A1 Sidi, D A1 Villain, E YR 2003 UL http://heart.bmj.com/content/89/2/205.abstract AB