Can I use a welder? 

It is recommended you avoid using welding currents above 160 amps. Follow the safety precautions below to minimize the risk of interfering with your heart device while welding with currents under 160 amps.

Welding Safety Precautions

Limit welding to currents less than 160 amps
Work in a dry area with dry gloves and shoes
Maintain a 2-foot (60cm) distance between the welding arc and heart device
Keep the welding cables close together and as far away as possible from your heart device. Place the welding unit approximately 5 feet from the work area.
Connect the ground clamp to the metal as close to the point of welding as possible. Arrange the work so the handle and rod will not contact the metal being welded if they are accidentally dropped.
Wait several seconds between attempts when having difficulty starting a weld
Work in an area that offers firm footing and plenty of room for movement
Work with an informed person who understands these suggestions
Immediately stop welding and step away from the area if you start feeling lightheaded, dizzy, or you believe your implantable defibrillator has delivered a shock

Since welding equipment may temporarily affect the normal operation of your heart device, any decision you make to use this equipment should be made in consultation with your heart doctor. Your doctor can advise you as to the degree of risk these responses pose for your medical condition.

Aprons or vests will not effectively shield your pacemaker or implantable defibrillator from the electromagnetic energy generated by welding equipment.