RT Journal Article SR Electronic T1 Inoue balloon dilatation of a mitral valve bioprosthesis JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 320 OP 320 DO 10.1136/hrt.81.3.320 VO 81 IS 3 A1 PETER F LUDMAN A1 MICHAEL P I PITT YR 1999 UL http://heart.bmj.com/content/81/3/320.abstract AB