Artifact on electromyography produced by an implanted sacral nerve stimulator.
A patient with muscle cramps was referred for nerve conduction studies and electromyography. Her study demonstrated bursts of spontaneous electromyography activity, which waxed and waned in amplitude with a "dive bomber"-like sound. The abnormal finding was found to be an artifact from an implanted sacral nerve stimulator for bladder incontinence.
O'carroll
Peter
P
University of Tennessee Health Science Center, Memphis, TN; and daggerWesley Neurology Clinic, Memphis, TN 38163, USA. pocarrol@utmem.edu
Bertorini
Tulio E
TE
Maccarino
Sue
S
D016477:Artifacts; D004558:Electric Stimulation / Q000295:instrumentation; D004567:Electrodes, Implanted / Q000009:adverse effects*; D004576:Electromyography; D005260:Female; D006801:Humans; D006850:Hydrocephalus, Normal Pressure / Q000150:complications; D008160:Lumbosacral Plexus / Q000502:physiology; D008875:Middle Aged; D009120:Muscle Cramp / Q000175:diagnosis*; D010003:Osteoarthritis / Q000150:complications; D012148:Restless Legs Syndrome / Q000150:complications; D012447:Sacrum / Q000294:innervation; D013035:Spasm / Q000175:diagnosis*; D014549:Urinary Incontinence / Q000150:complications / Q000601:surgery