SenTiva is the smallest and lightest responsive VNS Therapy device for treatment of drug-resistant epilepsy. In addition to the 3 modes of stimulation offered by previous generations of VNS Therapy devices - Normal Mode, Magnet Mode and AutoStim Mode, SenTiva / SenTiva DuoTM (Models 1000 / 1000-D) offers two additional programming options that can be tailored to your needs. These are called Scheduled Programming and Day & Night Programming.