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Potassium disorders and cardiac arrhythmias


Severe disturbances of potassium homeostasis can cause life-threatening cardiac arrhythmias and need urgent treatment. ‘Dangerous’ hyperkalaemia is relatively easy to define; ‘dangerous’ hypokalaemia, less so. This article reviews evidence for hypokalaemia as an independent risk factor for serious cardiac arrhythmia, and discusses the management of hypo- and hyperkalaemia.

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