Hypokalemic Periodic Paralysis

**Definition:** An autosomal dominant familial disorder characterized by recurrent episodes of skeletal muscle weakness associated with falls in serum potassium levels. The condition usually presents in the first or second decade of life with attacks of trunk and leg paresis during sleep or shortly after awakening. Symptoms may persist for hours to days and generally are precipitated by exercise or a meal high in carbohydrates. (Adams et al., Principles of Neurology, 6th ed, p1483)

**Tree numbers:** - C05.651.701.450 - C10.668.491.650.450 - C16.320.565.618.711.550 - C18.452.648.618.711.550

**Synonyms:** - HOKPP - Hypokalemic Periodic Paralysis, Familial - HYPOKPP - HYPOPP - Familial Hypokalemic Periodic Paralysis - Periodic Paralysis- Hypokalemic - Primary Hypokalemic Periodic Paralysis - Westphall Disease - Paralysis, Hypokalemic Periodic