A filter circuit embedded into a header of an implantable medical device attenuates energy that may otherwise enter the implantable medical device. At MRI frequencies, the impedance of the filter circuit is much higher than the impedance of the feedthrough capacitor of the implantable medical device. Thus, MRI-induced current that would otherwise enter the implantable medical device is limited by the filter circuit. Consequently, localized device heating that may otherwise occur during MRI scanning is significantly reduced by operation of the filter circuit. In some implementations, the header embedded filter circuit is electrically isolated from the header housing. In this way, localized heating of the header housing also may be avoided.
