Is Low Potassium a Sign of Cancer? Fact-Checking Blood Test Anomalies
The clinical implications of potassium depletion shift radically depending on the laboratory baseline and the speed at which serum concentrations drop.
| Severity Tier | Serum Range (mEq/L) | Physical & Muscular Signs | Cardiovascular & Systemic Risk |
|---|---|---|---|
| Mild | 3.0, 3.4 | Subtle fatigue, mild constipation, occasional leg cramps | Elevated blood pressure trends; minimal immediate rhythm risk |
| Moderate | 2.5, 2.9 | Noticeable muscle weakness, painful spasms, sluggish bowels | Heart palpitations, flattened T waves, increased ectopic beats |
| Severe | < 2.5 | Ascending flaccid paralysis, hypoventilation, paralytic ileus | Ventricular fibrillation, Torsades de Pointes, cardiac arrest |
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