RT Journal Article SR Electronic T1 Hyperkalaemia induced complete atrioventricular block with a narrow QRS complex JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP e5 OP e5 DO 10.1136/hrt.2004.046524 VO 91 IS 1 A1 N-H Kim A1 S K Oh A1 J-W Jeong YR 2005 UL http://heart.bmj.com/content/91/1/e5.abstract AB