RT Journal Article SR Electronic T1 Cardiac tissue velocities and strain rate in the early detection of myocardial dysfunction of asymptomatic boys with Duchenne’s muscular dystrophy: relationship to clinical outcome JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 840 OP 842 DO 10.1136/hrt.2005.067710 VO 92 IS 6 A1 Giatrakos, N A1 Kinali, M A1 Stephens, D A1 Dawson, D A1 Muntoni, F A1 Nihoyannopoulos, P YR 2006 UL http://heart.bmj.com/content/92/6/840.abstract AB