I have a pacemaker and have no problems with mig tig and stick. My normal testing and data transmission from my implant shows no problems. My Cardiologist main concern was not welding but magnets or anything that generates a magnetic field. His first question was about firearms he wanted to know if i shut right handed or left as the impact from a shotgun could break my wires or damage my implant. Some of the older pacemaker defibrillator's run at frequency's that can have an interference problem.
I have had no problems as i weld a lot and my pacemaker runs approximately 3.5 hours per a 24 hour period.
PowerTig 200DX
Supercut 50P
PowerTig Micro 185 SOLD GREAT MACHINE
Millermatic 200
Miller Thunderbolt
Jet 1340 Lathe
Jet 20" Drill Press
Jet 12" Wet Band Saw
Kalamazoo H7 Bandsaw
Forward 12,000 lb 4 Post Lift