hyperkalemic periodic paralysis

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hy·per·ka·le·mic per·i·od·ic pa·ral·y·sis

[type II MIM*170500]
a form of periodic paralysis in which the serum potassium level is elevated during attacks; onset occurs in infancy, attacks are frequent but relatively mild, and myotonia is often present; autosomal dominant inheritance caused by mutation in the sodium channel gene (SCN4A) on chromosome 17q.

hyperkalemic periodic paralysis

hyperkalemic periodic paralysis

See Periodic paralysis.

hy·per·ka·le·mic per·i·od·ic pa·ral·y·sis

(hī'pĕr-kă-lē'mik pēr'ē-od'ik păr-al'i-sis)
A form of periodic paralysis in which the serum potassium level is elevated during attacks; onset occurs in infancy, attacks are frequent but relatively mild, and myotonia is often present.
Synonym(s): hyperkalaemic periodic paralysis.

hyperkalemic periodic paralysis

inherited autosomal dominant defect in Quarter horses, probably as a result of selective breeding for muscling. A form of exertional rhabdomyolysis manifest by episodic weakness, muscle tremor and sometimes paresis, or pharyngeal and laryngeal dysfunction. There is an abnormality in the sodium channel and disturbance in flux of sodium and potassium across the muscle wall. Called also episodic muscular weakness.