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by animatedb 1764 days ago
The magnet is usually used as a mitigator to turn off the device in case the device is doing something wrong like producing pulses too fast. There is typically RF communication that can communicate to the device and can often be used to turn the magnet detection off, which means that the device will not quit working when a magnet is detected.
1 comments

When I first got my ICD it was wired up wrong. I was shocked 26 times in a row and then a magnet was used to disable it for the time being