Hyperkalaemia is a common, life-threatening electrolyte abnormality present in up to 10% of acute hospital admissions [1]. In patients receiving treatment with renin-angiotensin-aldosterone system (RAAS) blocking medication for heart failure, hypertension or diabetic nephropathy, the prevalence of hyperkalaemia exceeds 10% and in those with chronic kidney disease (CKD) (stage 4 or 5), this exceeds 20% [2]. Hyperkalaemia can result in fatal cardiac arrhythmias if not treated promptly. It typically requires in-hospital treatment and constitutes a medical emergency.
