RT Journal Article SR Electronic T1 Contemporary considerations for risk stratification, sudden death and prevention in hypertrophic cardiomyopathy JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 977 OP 978 DO 10.1136/heart.89.9.977 VO 89 IS 9 A1 B J Maron YR 2003 UL http://heart.bmj.com/content/89/9/977.abstract AB