Paralysis, Hyperkalemic Periodic


Adynamia Episodica Hereditaria

Adynamia Episodica Hereditaria with or without Myotonia

Disease, Gamstorp

Familial Hyperkalemic Periodic Paralysis

Gamstorp Disease

Gamstorp Episodic Adynamy



Hyperkalemic Periodic Paralysis

Hyperkalemic Periodic Paralysis Type 2

Hyperkalemic Periodic Paralysis, Familial

Hyperkaliemic Periodic Paralysis Type 2

Myotonic Periodic Paralysis

Paralysis, Periodic, Hyperkalemic, Familial

Primary Hyperkalemic Periodic Paralysis

Sodium Channel Muscle Disease

An autosomal dominant familial disorder which presents in infancy or childhood and is characterized by episodes of weakness associated with hyperkalemia. During attacks, muscles of the lower extremities are initially affected, followed by the lower trunk and arms. Episodes last from 15-60 minutes and typically occur after a period of rest following exercise. A defect in skeletal muscle sodium channels has been identified as the cause of this condition. Normokalemic periodic paralysis is a closely related disorder marked by a lack of alterations in potassium levels during attacks of weakness. (Adams et al., Principles of Neurology, 6th ed, p1481)