RT Journal Article SR Electronic T1 “Myxomatous” mitral stenosis JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1421 OP 1421 DO 10.1136/hrt.2004.034462 VO 90 IS 12 A1 S Atar A1 L Bloch A1 T Rosenfeld YR 2004 UL http://heart.bmj.com/content/90/12/1421.abstract AB