bacteria live on those implants and if they are located below your heart, odds are the electric shock will go right to them, so it would scare me. The russians state these do no harm, but the shock can hurt at times when metals are present. an example is your metal pants button, the zapper will shock this until you insulate it from your body. This has just now made be awaken to the fact that this metal button is bad for your health, it short circuts your frequencys known as our health, remove all metal from the human body!! do not sit on metals, etc. Don't work with metal for a living!!!!!!!!!!!!!!!!