To demonstrate the potential enhanced heating of abandoned (capped), damaged, or broken leads, we estimated in-vitro the deposited lead-tip power for a generic active implantable medical device (AIMD), intact and with wire breaks at regular intervals. We studied break size, a cut and capped lead, and a second wire parallel to the broken wire. The deposited lead-tip power enhancement was up to 30-fold over the intact lead. The presence of a nearby intact, or even broken, wire reduced this enhancement factor to ~3-fold. This shows the risk of extending MR-conditional labeling to broken, damaged, abandoned, or cut AIMD leads.
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