A body current of what value can lead to certain death from a brief shock?

The body current that can lead to certain death from a brief shock is typically around 2.75 A. This value falls within the range that has been established through studies on electrical shock and human physiology, indicating that currents around this magnitude can cause irreversible damage to the heart and other vital organs.

At 2.75 A, the risk of ventricular fibrillation increases significantly, which is a condition where the heart's electrical activity becomes disorganized, preventing it from pumping blood effectively. The heart cannot recover from this state without immediate medical intervention, making the body current at this level particularly lethal when sustained even for a short duration.

While currents higher than this value can also be dangerous and potentially fatal, the threshold identified here serves as a critical point for understanding the risks associated with electrical exposures. Lower currents may not present the same immediate life-threatening effects and may allow the heart to recover without severe consequences.