Potassium
Potassium is the primary intracellular electrolyte, essential for cardiac electrical activity, muscle contraction, and nerve signaling. Both high and low potassium can cause life-threatening cardiac arrhythmias.
High potassium (hyperkalemia) commonly results from kidney disease or certain medications (ACE inhibitors, potassium-sparing diuretics). Low potassium (hypokalemia) can result from diuretics, diarrhea, or inadequate dietary intake.
What It Measures
Serum potassium concentration.
Reference Ranges
| Status | Range (mEq/L) |
|---|---|
| Optimal | 4.0–4.5 mEq/L |
| Normal | 3.5–5.0 mEq/L |
| Borderline | 3.0–3.5 or 5.0–5.5 mEq/L |
| Out of Range | < 3.0 or > 5.5 mEq/L (dangerous) |
How GATOR Tracks This
Lab Providers
Related Biomarkers
This content is for informational purposes only and does not constitute medical advice. Reference ranges may vary by laboratory and individual factors. Consult a qualified healthcare provider for interpretation of your results and treatment decisions.
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