Gen III 2010 Prius - Any Prius owner with a pacemaker or defibrillater? Did you consult with your cardiologist? Toyota rep. told me the frequency is 134.2 killahertz.
Killahertz? Yeah I guess that would be what happens if it interferes.. The very first hit on 'pacemaker smart key' was this. Dr. Wes: Pacemakers, Defibrillators, and Hybrid Cars It may help.