Abstract
A day in the life of a GP usually begins with the daily trawl through our email inbox to check the results of the blood tests. The assessment of renal function, with U + Es (i.e. urea, creatinine, sodium and potassium), will form a significant percentage of them. Severe hyperkalaemia is a life-threatening emergency as it may cause cardiac arrhythmias, leading to cardiac arrest. With these potentially catastrophic sequelae, urgent investigation and treatment of genuine hyperkalaemia is essential. Common causes of hyperkalaemia include renal failure, metabolic acidosis and drugs (e.g. potassium sparing diuretics, Angiotensin Converting Enzyme (ACE) inhibitors and excess potassium therapy). However, a well recognized cause of raised serum potassium is pseudohyperkalaemia.
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