Don Foreman wrote:
Does an implanted cardiac defibrillator preclude use of MIG and TIG,
particularly TIG with HF?

How about a different approach. Others have mentioned a conductive suit.
Shield your welder and welding leads. Greenfield flex conduit over most
of the cable with shielded Zippertubing over the rest. More difficult to
use the welder, of course, but _perhaps_ a significant reduction in
radiation is enough.
The key is to find out what levels the medical device is required to
withstand. The manufacturer is more likely to tell you the test standard
than to tell you it's okay to engage in an activity over which they have
no control.

This page has some standard levels, and compared to the death ray
business (200v/meter is common) the field strength the medical devices
have to stand is next to nothing.

http://www.devicelink.com/mddi/archive/02/08/003.html

If in doubt, don't. There are lots of other things to enjoy.



Kevin Gallimore