RT Journal Article SR Electronic T1 Unusual Doppler trace in mitral stenosis: prominent isovolumic relaxation flow JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 172 OP 172 DO 10.1136/heartjnl-2011-301196 VO 98 IS 2 A1 Salman Salahuddin A1 Balram Bhargava YR 2012 UL http://heart.bmj.com/content/98/2/172.abstract AB