A nurse is assisting with the care of a client whose laboratory results show blood glucose 700 mg/dL, potassium 2.9 mEq/L, sodium 131 mEq/L, magnesium 1.0 mEq/L, anion gap 22 mEq/L, and positive urine ketones. Complete the following sentence by choosing the correct options: The client is at risk for cardiac dysrhythmias due to which of the following?