A patient's sinus rhythm rate is 62. The PR interval is 0.18 seconds at 1:00 AM, 0.20 seconds at 12:30 PM, and 0.23 seconds at 4:00 PM. Which action should the nurse take?

Hold the ordered metoprolol (Lopressor) and call the health care provider.

Give the PRN dose of Amiodarone.

Prepare for possible pacemaker insertion.

Document the patient's rhythm and continue to monitor.