Hypokalemic periodic paralysis
Hypokalemic periodic paralysis ( hypoKPP ) , also known as familial hypokalemic periodic paralysis ( FHPP ) , is a rare , autosomal dominant channelopathy characterized by muscle weakness or paralysis when there is a fall in potassium levels in the blood . 
<triplet> Hypokalemic periodic paralysis <subj> channelopathy <obj> instance of