How can haemofiltration with Duosol with 2 mmol/l Potassium unmask digitalis toxicity?

Haemofiltration with Duosol with 2 mmol/l Potassium can correct hyperkalaemia, hypermagnesaemia and hypocalcaemia that mask digitalis toxicity, revealing symptoms such as cardiac arrhythmia; low potassium or high calcium can allow toxicity even at sub-optimal digitalis doses.