%0 Journal Article %A P Rerkpattanapipat %A C Brown %A D W Kitzman %T Improved detection of protruding apical thrombus with contrast echocardiography %D 2003 %R 10.1136/heart.89.11.1297 %J Heart %P 1297-1297 %V 89 %N 11 %U https://heart.bmj.com/content/heartjnl/89/11/1297.full.pdf