RT Journal Article SR Electronic T1 Thrombus at the junction of the inferior vena cava and right atrium: a contraindication for transfemoral percutaneous mitral commissurotomy JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 694 OP 694 DO 10.1136/hrt.2005.078030 VO 92 IS 5 A1 S Bohora A1 K K N Namboodiri A1 K M Krishnamoorthy YR 2006 UL http://heart.bmj.com/content/92/5/694.abstract AB