Which activity should be avoided after implantation of a permanent cardiac pacemaker?

Which activity should be avoided after implantation of a permanent cardiac pacemaker?

• A. CT scan
• B. Standing near a microwave
• C. Swimming in saltwater
• D. Touring a power plant

Answer: (D)

External electromagnetic fields can interfere with how a pacemaker senses and paces the heart. Strong EMI can temporarily disrupt pacing, cause inappropriate sensing, or even reprogram the device, which can be dangerous for someone who depends on it. A tour of a power plant exposes you to substantial electromagnetic fields from generators, transformers, and other high‑voltage equipment, making it the activity to avoid. In contrast, diagnostic imaging like a CT scan is designed to be compatible with implanted devices with proper precautions, microwaves from a household oven are well-shielded and not a typical hazard at normal distances, and swimming in saltwater doesn’t directly affect the device since it’s protected under the skin.

External electromagnetic fields can interfere with how a pacemaker senses and paces the heart. Strong EMI can temporarily disrupt pacing, cause inappropriate sensing, or even reprogram the device, which can be dangerous for someone who depends on it.

A tour of a power plant exposes you to substantial electromagnetic fields from generators, transformers, and other high‑voltage equipment, making it the activity to avoid. In contrast, diagnostic imaging like a CT scan is designed to be compatible with implanted devices with proper precautions, microwaves from a household oven are well-shielded and not a typical hazard at normal distances, and swimming in saltwater doesn’t directly affect the device since it’s protected under the skin.