Hyperkalemia is a medical condition characterized by elevated levels of potassium in the blood. Potassium is a critical electrolyte necessary for normal cell function, especially in the heart and muscles. Normal blood potassium levels range from 3.5 to 5.0 mEq/L. Hyperkalemia is typically defined when levels exceed 5.0 mEq/L, and severe hyperkalemia is considered when levels exceed 6.0 mEq/L.
