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biochemistryHas Critical Values
Potassium
K⁺· also: K⁺, Potassium
Clinical Overview
Potassium is essential for heart rhythm, muscle contraction, and nerve function. Both low (hypokalemia) and high (hyperkalemia) levels are potentially life-threatening.
Reference RangesWHO/IFCC standards
| Reference Range | Unit | Notes |
|---|---|---|
| 3.5 – 5 | mEq/L | — |
Also reported in: mmol/L.
Critical (Panic) Values
Critical Low: < 2.5 mEq/L. Critical High: > 6.5 mEq/L. Values outside these limits require immediate clinical attention.
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Related Topics
electrolytescardiachypokalemiahyperkalemia