Which of the following is TRUE regarding electrical...

Which of the following is TRUE regarding electrical injuries? (A) Household voltage (110 V) may cause ventricular fibrillation without evidence of electrical burns. (B) Low-voltage $\mathrm{AC}$ is more likely to produce transient ventricular asystole, and high-voltage AC is more likely to cause ventricular fibrillation. (C) Labial artery bleeding commonly occurs immediately after oral electrical burns. (D) Delayed cardiac arrhythmias are common after household voltage electrical injuries.

Which of the following is TRUE regarding electrical injuries?
(A) Household voltage (110 V) may cause ventricular fibrillation without evidence of electrical burns.
(B) Low-voltage $\mathrm{AC}$ is more likely to produce transient ventricular asystole, and high-voltage AC is more likely to cause ventricular fibrillation.
(C) Labial artery bleeding commonly occurs immediately after oral electrical burns.
(D) Delayed cardiac arrhythmias are common after household voltage electrical injuries.

Key Concepts

Electrical Injury

Electrical injury refers to tissue damage caused by the passage of an electrical current through the body. Such injuries can lead to extensive internal damage, even in the absence of significant external burns. The effects are determined by factors such as the voltage, current type (AC or DC), pathway of the current, and duration of exposure.

Household Voltage Injuries

Household voltage, typically around 110-120 volts, is capable of causing serious cardiac complications despite its relatively low level compared to industrial high-voltage sources. In these injuries, the electrical current can disrupt the cardiac conduction system and result in dangerous arrhythmias, like ventricular fibrillation, even when external signs of burn injury are minimal or absent.

Ventricular Fibrillation

Ventricular fibrillation is an erratic and disorganized heartbeat that can be rapidly fatal if not promptly treated. In the context of electrical injuries, the passage of an electric current through the heart can precipitate this arrhythmia. It is a primary concern in electrical injuries even when the voltage seems low, underlining the importance of cardiac monitoring following exposure.

Electrical Burns

Electrical burns can be deceptive, as the entry and exit wounds may be small or deceptively benign while underlying tissue damage is extensive. The absence of significant burn marks at the skin surface does not rule out serious internal electrical injury, particularly in cases where the current has traversed the heart or other vital organs.

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