Name a common contraindication for all electrical stimulation modalities.

• A. Open wounds
• B. Sensitivity to warm sensations
• C. Presence of a pacemaker or implanted device in the treatment area
• D. Recent intense exercise

Answer: (C)

When using electrical stimulation, safety hinges on avoiding interactions with implanted devices. The presence of a pacemaker or other implanted device in the treatment area is a common contraindication because the electrical currents used for therapy can interfere with the device’s sensing and pacing function. This interference can cause the device to misread cardiac signals, deliver inappropriate pacing, or fail to pace when needed, and energy can heat nearby leads or tissue. Because these devices rely on precise electrical signaling, external stimulation can disrupt their operation and pose serious risks. Therefore, applying any electrical stimulation over an area with a pacemaker or implanted device is avoided unless a clinician and the device manufacturer have specifically cleared it. Open wounds, warmth sensitivity, and recent intense exercise are not universal contraindications for all modalities and may be managed or adjusted case by case.