Which of the following is NOT a contraindication for using electric current?

Healthy skin is not a contraindication for using electric current because it refers to skin that is intact and functioning normally. Electric current treatments, such as those used in various esthetic procedures, are typically safe on healthy skin that has not been compromised by conditions such as infections or injuries. In fact, these procedures can be beneficial for maintaining skin health and appearance.

In contrast, heart conditions, pacemakers, and open wounds present potential risks when applying electric current. Heart conditions can affect how the heart responds to electrical stimulation, while a pacemaker can be disrupted by electric current, leading to serious health issues. Likewise, using electric current on open wounds can exacerbate the injury, increase the risk of infection, and impede the healing process. Thus, healthy skin is the only choice that is appropriate for electrical treatments, affirming that it poses no inherent risks.