It was reported that a vector express test was started and the patient spontaneously went into ventricular fibrillation.It was then impossible to manually deliver the shock because the programmer was non-responsive.A window popped up during the test and it could not be completed due to the competing rhythm.The programmer had to be shut down and restarted twice.The associated implantable cardioverter defibrillator (icd) was not programmed on because the implant procedure was not yet over.The patient did not receive any high voltage therapies from the icd.Before and after this incident, no issues with the touch pen.This was a new programmer, only used once or twice prior to this event.External defibrillation was needed since the internal icd was off and the programmer was frozen, so it was not possible to turn on therapies.The programmer is expected to be returned to the manufacturer.No further complications were reported as a result of this event.
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