Electrical stimulation modalities (this would include ANY electrical stimulation delivered through surface or implanted electrodes - like TENS, Interferential, muscle stimulation, Russian currents, H wave and a whole host of others) are best avoided anywhere if you have a pacemaker. The delivery of an electrical current from an external source has the potential to cause interference with the operation of the pacemaker and whilst some pacemakers are fine, others are not, and there have been reports in the literature of interference and problems.

It is argued that applying TENS to the low back (for example) is far enough away not to be a problem BUT given that this is not yet established, the safest thing is to NOT USE ANY ELECTRICAL STIMULATION for ANY person who has a pacemaker fitted.

Information courtesy of Professor Tim Watson- leading expert in Electrotherapy.