RT Journal Article SR Electronic T1 Conduction defects and mitral annulus calcification. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 162 OP 167 DO 10.1136/hrt.44.2.162 VO 44 IS 2 A1 C K Nair A1 V Runco A1 G T Everson A1 A Boghairi A1 A N Mooss A1 S M Mohiuddin A1 M H Sketch YR 1980 UL http://heart.bmj.com/content/44/2/162.abstract AB