Last updated: Friday, 06, August, 2010
CausesAppropriate Tests

These genetic diseases show autosomal dominant inheritance in most cases.

Myotonic dystrophy 

Molecular genetics - individual genetic disorders for diagnosis and as a guide to clinical severity. See Myotonic dystrophy testing.

Muscle biopsy (consult pathologist; special collection procedures are required for open biopsy).

Myotonia congenita

Paramyotonia congenita

Hyperkalaemic periodic paralysis


Potassium, however some cases are normokalaemic.