An MRI-compatible electronic medical therapy system includes an active
medical device connected to a plurality of electrodes. A multiplexer
circuit includes at least one circuit protection device in electrical
series with the electrodes and the medical device. The circuit protection
device can be in the form of a switch or a band stop filter. The circuit
protection device is adapted to permit current flow therethrough during
normal medical device related therapy, but substantially prevent current
flow therethrough in the presence of an induced electromagnetic field.