Hyperkalaemia can lead to life-threatening cardiac arrhythmias. A good understanding of the physiological basis of management can help us rationalise treatment and reduce plasma potassium levels efficiently and effectively. Management focuses on avoidance of arrythmias, rapid intracellular movement of potassium and finally reduction of total body potassium. Fluid management in hyperkalaemia should be carefully considered, with balanced solutions providing theoretical benefits compared to 0.9% saline in certain situations.
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