Problem: A dehydrated patient presents to the ER in a confused state, quickly progressing to coma. Lab work indicates a sodium level of 118 mEq/L, potassium level of 3.8 mEq/L, and Ca++ 9.0. The patient's signs and symptoms are most likely caused by what electrolyte imbalance? A dehydrated patient presents to the ER in a confused state, quickly progressing to coma. Lab work indicates a sodium level of 118 mEq/L, potassium level of 3.8 mEq/L, and Calcium 9.0. The patient's signs and symptoms are most likely caused by what electrolyte imbalance? Hyponatremia causing cerebral edema Hypervolemia and hyperkalemia Hypernatremia due to dehydration Hypercalcemia due to hypovolemia