Reporter indicated that after increasing programmed parameters, the pt experienced a choking sensation.
During the episode, the pt's eyes became dilated and pt passed out.
Treating neurologist was unable to get a pulse for a short period of time, but reported that the pt regained consciousness after prgrammed settings were reduced to original parameters.
The pt was sent home in good condition after resting in the doctor's office.
It was reported that programmed parameters were increased due to an increase in seizures activity; however, investigation to date has been unable to determine whether the increase was above pre-vns baseline frequency.
At follow-up office visit two days later, device diagnostic testing with within normal limits, indicating proper device function.
Normal mode output current was reduced from 1.
25ma to 1.