ECG Vector Determination

This is a prospective, unblinded, non-randomized, descriptive study designed to collect ECG data and determine the process for proper generator and lead placement. The study will be conducted in two phases: Phase I includes ECG data collection from human subjects; Phase II, the Implant Instructions for Use will be evaluated by Cyberonics' Clinical Engineers based on the activities of five to eight experienced VNS surgeons.

Inclusion criteria

• At least 12 years old and in general good health for Phase I. At least 18 years old and in general good health for Phase II.
• Patients or their guardians must be willing to provide signed informed consent/assent and HIPAA authorization. Note: Patients diagnosed with epilepsy and taking at least 1 antiepileptic medication are desired but not required for the study.

Exclusion criteria

• History of pathologically significant cardiac arrhythmias including but not limited to atrial fibrillation or flutter, chronotropic incompetence, supraventricular tachycardia, ventricular flutter or fibrillation, or implantation of a permanent cardiac pacemaker or defibrillator.
• Currently present existing signs of skin irritation or rash on the left neck or upper left chest as determined by the PI.
• History of physical adverse reaction to adhesive electrodes.