Imperial Collage Healthcare

Voltage gated potassium channel antibodies


Test Background
Voltage gated potassium channel antibodies are seen in neuromyotonia.


Clinical Indications
Presentation of muscle cramps, myotonia-like symptoms, excessive sweating, myokymia and fasciculations Diagnosis of Morvan’s syndrome (sleep disorders, memory loss and confusion)


Reference Range

Normal = 0 - 69 pmol/L

Equivocal = 70-130 pmol/L

Positive = >130 pmol/


Sample Required
RST (rust top), Gel SST (yellow top), Can also be performed on CSF


Sample Volume
5-10 mL (2 mL serum)


Turnaround Time
28 days


Notes
Not currently performed in house; this test is referred to the Department of Immunology at the Churchill Hospital in Oxford.

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