RT Journal Article SR Electronic T1 Ascending aortic obstruction produced by dissected intimal flap. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 452 OP 454 DO 10.1136/hrt.46.4.452 VO 46 IS 4 A1 P G Roan A1 L M Buja A1 J C Grammer YR 1981 UL http://heart.bmj.com/content/46/4/452.abstract AB