Which derangement in electrolytes commonly occurs in conjunction with rhabdomyolysis from crush injuries?

Rhabdomyolysis, a condition often resulting from crush injuries, is characterized by the breakdown of muscle fibers that releases intracellular contents into the bloodstream, including significant amounts of potassium. As muscle cells are damaged, potassium that is typically confined to the intracellular space leaks into the extracellular compartment, leading to elevated serum potassium levels, a condition known as hyperkalemia.

Hyperkalemia can have serious implications for cardiac function, potentially leading to arrhythmias or even cardiac arrest if not monitored and managed appropriately. Given that the question specifically addresses the electrolytic derangement commonly associated with rhabdomyolysis from crush injuries, the observation of hyperkalemia serves as a critical clinical sign to consider in these patients.

Other electrolyte disturbances may occur in rhabdomyolysis, but hyperkalemia is particularly notable due to its direct correlation with the muscle injury and the rapid release of potassium into the bloodstream, making it the most relevant choice in this context.