As with other types of electronic products, microwave energy could cause undesirable currents to flow in the electric leads of a pacemaker. This is because devices such as these can generate electronic interference that can be intercepted by the tiny electronic circuits and wires of a pacemaker. If the pacemaker is exposed to sufficiently intense levels of microwave energy, unwanted currents can flow in its wires and circuits that may cause the pacemaker to dysfunction. While such problems are unlikely, it makes sense to warn pacemaker users whenever a microwave oven is in use. All patients with pacemakers should consult with their physicians for the final word on this matter.
Microwaves are simply a source of heat energy just like gas and electricity.
All three produce cooking in the food itself. Food cooked in a microwave oven is not radioactive or contaminated and is not harmful to eat. Microwaves do not escape through the small perforations in the door, nor do they get out through the exhaust vents, because of the physical characteristics microwave energy. The inverse is also true. Therefore, microwaves are simply too large to pass through the small holes in the door and in the exhaust vent openings.