RT Journal Article SR Electronic T1 Echocardiography 1996 JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1 OP 1 DO 10.1136/hrt.75.6_Suppl_2.1 VO 75 IS 6 Suppl 2 A1 M J Monaghan A1 P Nihoyannopoulos YR 1996 UL http://heart.bmj.com/content/75/6_Suppl_2/1.abstract AB