RT Journal Article SR Electronic T1 Unruptured right sinus of Valsalva aneurysm JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 140 OP 140 DO 10.1136/hrt.80.2.140 VO 80 IS 2 A1 H KITAOKA A1 N HITOMI A1 Y L DOI YR 1998 UL http://heart.bmj.com/content/80/2/140.abstract AB