**Core Concept**
High-voltage electrical burns to an extremity involve electrical current passing through the body, causing thermal injuries, muscle contractions, and potential cardiac arrest. This type of injury can lead to significant tissue damage, including necrosis, and may compromise the function of the affected limb.

**Why the Correct Answer is Right**
When high-voltage electricity enters the body, it creates an electrical pathway through tissues, leading to rapid heating, charring, and coagulation of proteins. This process causes extensive damage to the skin, muscles, and underlying tissues. The electrical current may also disrupt cardiac function, potentially leading to cardiac arrest. **Option C** is the correct answer because it recognizes the potential for cardiac complications and the importance of prompt medical attention in preventing further damage.

**Why Each Wrong Option is Incorrect**
**Option A:** is incorrect because it does not acknowledge the potential for cardiac complications and the need for prompt medical treatment. While immediate wound care is essential, it does not address the underlying electrical injury and its potential effects on the heart.

**Option B:** is incorrect because it focuses solely on wound care, neglecting the potential for cardiac complications and the need for thorough assessment and treatment.

**Clinical Pearl / High-Yield Fact**
In cases of high-voltage electrical burns, it is crucial to assess the patient's cardiac function promptly, as cardiac complications can arise even after the initial electrical injury has passed.

**Correct Answer:** C