REVITIVE TENS ELECTRODES (2 pairs of replacement TENS electrodes) TENS electrodes can be used to treat specific areas of the body such as the knees, shoulders, back or arms. Reusable electrodes (20-30 applications) can be used with the Revitive IX or Revitive LV pacemakers. NOT SUITABLE FOR: - People with a pacemaker or defibrillator - Women in the first trimester of pregnancy - People who have had symptoms of pre-existing deep vein thrombosis (DVT) or who are being treated for this form of thrombosis.