%0 Journal Article %A M J Metcalfe %A P H Seidelin %T Images in cardiology. ECG changes of severe hyperkalaemia. %D 1994 %R 10.1136/hrt.72.3.260 %J British Heart Journal %P 260 %V 72 %N 3 %U https://heart.bmj.com/content/heartjnl/72/3/260.full.pdf