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Familial hypokalemic periodic paralysis
Other Resources UpToDate PubMed

Familial hypokalemic periodic paralysis

Contributors: Catherine Moore MD
Other Resources UpToDate PubMed

Synopsis

Rare autosomal dominant neuromuscular disorder typically found in adolescent males (due to mutations of CACNA1s and SCN4A). Characterized by episodes of painless muscle weakness precipitated by heavy exercise, fasting, or high-carbohydrate meals.

This paralysis, unlike hyperkalemic periodic paralysis, is associated with low potassium levels (<2.4 mEq/L; <2 suggests a secondary cause of hypokalemia). Established familial history is diagnostic.

Codes

ICD10CM:
G72.3 – Periodic paralysis

SNOMEDCT:
82732003 – Familial hypokalemic periodic paralysis

Best Tests

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References

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Last Updated:01/16/2022
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Familial hypokalemic periodic paralysis
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A medical illustration showing key findings of Familial hypokalemic periodic paralysis : Flaccid paralysis, Proximal muscle weakness, Recurring episodes or relapses, Reflexes decreased, Generalized weakness, K decreased
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