What is Hypokalemia

Hypokalemia is a condition of blood having low concentration of blood.

As per the definition from wiki - http://en.wikipedia.org/wiki/Hypokalemia
Hypokalemia refers to the condition in which the concentration of potassium in the blood is low. The prefix hypo- means low (contrast with hyper-, meaning high). Kal refers to kalium, the Neo-Latin for potassium, and -emia means "in the blood."

Also refer to the above page for more information on Causes, Signs Symptoms, treatment, Hypokalemia in pets

Hypokalemia can result from the following general causes: Either from an overall depletion in the body's potassium or from excessive uptake of potassium by muscle from surrounding fluids. - from http://www.answers.com/topic/hypokalemia

Also read this for more on Hypokalemia
http://www.hmc.psu.edu/healthinfo/h/hypokalemia.htm