A client who underwent cardiac stent placement four days ago arrives to the emergency department reporting a sudden onset of chest pressure and shortness of breath. Which action should the nurse take next?

Verify troponin level assessments are scheduled every 3 to 6 hours for a series of three.

Place an indwelling urinary catheter and institute strict intake and output measurements.

Count and record the number of premature ventricular contractions per minute.

Record pain score and administer sublingual nitroglycerine every 5 minutes up to 3 doses.