Welding with a pacemaker

MopaR&D said

I don't know from experience but I'd imagine even if you grounded yourself, had insulating clothes etc. the intense arc from welding might produce an electric/magnetic field strong enough to affect the pacemaker since it's likely less than a foot away from what you're welding. Just a thought though I really don't know for sure.

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This, with the magnetic lines of flux thrown off from the high current going through the stinger (TIG/MIG/Stick) your pacemaker isn’t going to like it. At work we had fairly big degausser for magnetic tapes and there were warning lights to the room we had to turn it on anytime it was powered up so people with pacemakers would know.