Abstract: The objective was to illustrate the relationship between CK and clinical features in hy-pokalemic periodic paralysis by retrospective study. The methods of detecting CK, related laboratory tests, electrophysiological tests and combining them with clinical features were used. There were significant difference between normal and increased CK group in the force of muscle, myalgia, potassium, U wave and duration of diseases. The increased CK reflects damage of muscles and is also related with the prognosis to some extent.

Key words: hypokalemic periodic paralysis, creatine kinase, hypokalemic