A patient is being discharged after receiving a new permanent pacemaker. Which instruction is most critical for the nurse to include in the discharge teaching?

The correct answer to the question "A patient is being discharged after receiving a new permanent pacemaker. Which instruction is most critical for the nurse to include in the discharge teaching?" is Option C: Limit arm movements, especially above the shoulder, on the affected side for 6-8 weeks..

The other options — A) Avoid using microwave ovens as they can interfere with the pacemaker., B) Report any signs of dizziness, fatigue, or swelling in the arm on the pacemaker side., D) It is safe to resume all normal activities, including heavy lifting, after one week. — are incorrect for this NCLEX-RN Exam Prep question. As explained above: Limiting arm movement on the affected side after pacemaker insertion is crucial to prevent dislodgement of the leads from the myocardium, which could lead to complications requiring reoperation.