Priority Decision: A patient's rhythm strip indicates a normal $\mathrm{HR}$ and rhythm with normal $\mathrm{P}$ waves and $\mathrm{QRS}$ complexes, but the PR interval is 0.26 second. What is the most appropriate action by the nurse?
a. Continue to assess the patient.
b. Administer atropine per protocol.
c. Prepare the patient for synchronized cardioversion.
d. Prepare the patient for placement of a temporary pacemaker.