Abnormally low plasma potassium.
A deficiency of potassium in the blood.
An abnormally low concentration of potassium in the blood.
Hypokalemia refers to a condition characterized by a deficiency of potassium in the blood. Typically, it is caused by excessive fluid loss, such as in severe diarrhea. However, it can also result from the use of diuretic drugs as a part of treatment.