%0 Journal Article %A A. R. R. Cumming %A A. J. Shillitoe %T BALL-VALVE MITRAL OBSTRUCTION BY A SARCOMA OF A PULMONARY VEIN %D 1957 %R 10.1136/hrt.19.2.287 %J British Heart Journal %P 287-289 %V 19 %N 2 %U https://heart.bmj.com/content/heartjnl/19/2/287.full.pdf