RT Journal Article SR Electronic T1 AV junctional versus left atrial rhythm. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 358 OP 366 DO 10.1136/hrt.33.3.358 VO 33 IS 3 A1 N El-Sherif YR 1971 UL http://heart.bmj.com/content/33/3/358.abstract AB