RT Journal Article SR Electronic T1 Large thrombus entrapped in a patent foramen ovale of the atrial septum, which apparently “disappeared” without embolic events JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 474 OP 474 DO 10.1136/heart.88.5.474 VO 88 IS 5 A1 N Watanabe A1 T Akasaka A1 K Yoshida YR 2002 UL http://heart.bmj.com/content/88/5/474.abstract AB