RT Journal Article SR Electronic T1 Conduction disturbances after surgical closure of ventricular septal defect. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1199 OP 1204 DO 10.1136/hrt.34.12.1199 VO 34 IS 12 A1 G M Ziady A1 K A Hallidie-Smith A1 J F Goodwin YR 1972 UL http://heart.bmj.com/content/34/12/1199.abstract AB