An adult client states she has been drinking a very large amount of water since she has begun walking everyday. She has been transported to the emergency room due to acute confusion. Which electrolyte imbalance is most likely the cause of this client's symptoms?

The electrolyte imbalance that is most likely the cause of this client's symptoms is hyponatremia.

Explanation:

Hyponatremia is an electrolyte imbalance in which the sodium level in the blood is low which causes water to be accumulated. Hyponatremia can be caused for things like drinking too much water which dilutes the sodium and allows the water level of the body to increase and the cells start to swell which can generate different symptons like diarrhea, confusion, headache and more complicated things like seizures and coma.