RT Journal Article SR Electronic T1 Interventricular septal expansion of a sinus of Valsalva aneurysm: a rare cause of complete heart block JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 202 OP 203 DO 10.1136/hrt.80.2.202 VO 80 IS 2 A1 M I Walters A1 D Ettles A1 L Guvendik A1 G C Kaye YR 1998 UL http://heart.bmj.com/content/80/2/202.abstract AB