ABSTRACT

Hypokalemic periodic paralysis is a congenital disorder which is characterized by intermittent episodes of muscle weakness or paralysis. The attacks can occur everyday or once a year may last for a few hours or for several days. The potassium level of serum is low during the attack. But the serum potassium levels are normal between two attacks. There is no potassium deficiency in the whole body.

In this paper, a mother and two sons who had first attack of familial hypokalemic periodic paralysis at 1st decade following viral and/or upper airway infections were presented according to the clinical and laboratory features.