It's not the microwaves I would be concerned about but RF emmission from the microwave generator. Some older pacemakers had an external wire that can act as an antenne - especially if they have just been fitted it lets the doctors tune them to the patient heart before they are fixed permanently."If you wear a pacemaker, please stay at least 3-feet away during oven operation"
You're exposed to 2.4GHz radiation all the time from wi-fi and other sources, so obviously 'any' leakage is not going to cook you. And it wouldn't be the GHzes as much as the Watts that did.At microwave frequencies (2.4Ghz) any leakage is going to cook you before it poses an electrical problem for a metal cased surgical embedded pacemaker.
My point was that to have enough watts to affect the pacemaker electrically you are already going to be cooked!You're exposed to 2.4GHz radiation all the time from wi-fi and other sources, so obviously 'any' leakage is not going to cook you. And it wouldn't be the GHzes as much as the Watts that did.
The concern is probably the lower frequency radio field form the microwave tube driver. Even an unsheilded pacemaker is quite well sheilded inside you.It's true it is not going to hurt a pacemaker, but because they're shielded against this. Old, non-shielded pacemakers were vulnerable to RF from many sources.
Minor nitpick: designing an oven so that NO leakage occurs is physically impossible. There are, however, standards set by the FDA which set the maximum permissible leakage to a field strength of 5 mW/cm^2 as measured 5 cm from any outer surface of the appliance. Most new ovens do better than this by nearly an order of magnitude. Old and especially misused/poorly maintained ovens can do significantly worse.Microwave ovens are designed so that no radiation is emitted.