A nurse is reviewing laboratory results for a client who has been experiencing muscle weakness and cardiac dysrhythmias. The client's serum potassium level is 2.9 mEq/L (2.9 mmol/L). Which of the following findings should the nurse expect to observe?
- Hyperactive deep tendon reflexes
- Weak, irregular pulse
- Positive Chvostek's sign
- Increased gastrointestinal motility