A client is started on continuous venovenous hemofiltration (CWH), Which finding would require immediate action by the nurse?

Sodium level of 138 mEq/L (138 mmol/L)

Pulse rate of 88 beats/min

Blood pressure of 76/58 mm Hg

Potassium level of 5.5 mEq/L (5.5 mmol/L)