What Causes Hypokalemia?

Hypokalemia is a potentially serious condition that occurs when the potassium levels in the blood become too low. Potassium is necessary for the healthy function of an individual's muscle cells and nerves. It's especially essential to helping the heart muscle function. Potassium is an electrolyte controlled by the kidneys, and as the kidneys filter potassium, any excess electrolytes exit the body through urine or sweat. There are several other names for hypokalemia, including low potassium syndrome hypokalemic syndrome, and hypopotassemia syndrome.