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How best to reduce electrical artifact

Todd Garber2/12/19 10:18 PM (CST)
When I do EMGs and NCVs in my office, I have quite a bit of artifact that I am pretty sure is 60 Hz.  Unfortunately, it is so strong that a fair amount persists even when using the 60 Hz filter.  Does anybody have suggestions on how to reduce this artifact or identify the source of it so that I can remove it?
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