Should someone with a pacemaker use a laptop with a Wi-Fi connection on their lap? Jack Freeman
That's a good question for your doctor, and I'm not one. However, someone at the Mayo Clinic in the US tested "cardiac devices" against an iPaq Pocket PC fitted with a Cisco Aironet wireless card, and Your Total Health reports that "the PDAs were proven safe".
Since Wi-Fi networks operate at very low power levels in a public waveband (it's also used for radio-controlled model cars, cordless phones and so on), I would not expect any significant risks, or else I would expect a warning from the American Heart Association. Its page on pacemakers doesn't warn against Wi-Fi.
