<prompt> Which of the following is not contraindicated for use of digitalisAcute rheumatic carditisThyrotoxicosisWPW syndromeHyperkalemia  <response>: Hyperkalemia, also spelled hyperkalaemia, is an elevated level of potassium K in the blood serum. Normal potassium levels are between 3.5 and 5.0 mmolL 3.5 and 5.0 mEqL with levels above 5.5 mmolL defined as hyperkalemia. Typically this results in no symptoms. Occasionally when severe it results in palpitations, muscle pain, muscle weakness, or numbness. An abnormal hea rate can occur which can result in cardiac arrest and death. Refer kDT 6e p499 