ECG Vector Determination

Inclusion Criteria:

1. 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.
2. 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:

1. 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.
2. Currently present existing signs of skin irritation or rash on the left neck or upper left chest as determined by the PI.
3. History of physical adverse reaction to adhesive electrodes.