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Physician’s Manual — VNS Therapy Programming Software (8.1)
11. G
LOSSARY
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Adverse Event (AE)
Any symptom, sign, illness, or experience that develops or
worsens in severity and/or frequency during the course of the
study (i.e., any changes from baseline)
AED
Antiepileptic drug(s)
duty cycle
Percentage of time during which stimulation occurs; stimulation
time (programmed ON time plus two seconds of ramp-up time and
two seconds of ramp-down time) divided by the sum of signal ON
and OFF times
EMI
Electromagnetic interference
EOS
End of Service
excess duty cycle
Duty cycle for which the ON time is greater than the OFF time
generalized onset seizure (
epilepsy
)
Type of seizure that involves all parts of the brain and, usually, an
alteration in consciousness
high Lead impedance
Resistance to the flow of output current produced by the Pulse
Generator, caused by any of the following: dry nerve (during
surgery), Lead discontinuity, Lead disconnection from the Pulse
Generator, fibrosis between the nerve and electrode, electrode
detachment from the nerve, or a defective Pulse Generator
IFI
Intensified Follow-up Indicator
LIMIT output current
Output current other than that which was programmed; not a sole
indicator of a device malfunction
low Lead impedance
Lower than expected resistance to the flow of output current
produced by the Pulse Generator potentially caused by a short-
