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Our Hyperkalemia Main Article provides a comprehensive look at the who, what, when and how of Hyperkalemia

Definition of Hyperkalemia

Hyperkalemia: Elevated blood potassium.

Potassium is the major positive ion (cation) found inside of cells. The chemical notation for potassium is K+.

The proper level of potassium is essential for normal cell function. An abnormal increase (or decrease) of potassium can profoundly affect the nervous system and heart, and when extreme, can be fatal.

The normal blood potassium level is 3.5 - 5.0 milliEquivalents/liter (mEq/L), or in international units, 3.5 - 5.0 millimoles/liter (mmol/L). See also: Potassium balance.


Last Editorial Review: 6/27/2004

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