Header embedded filter for implantable medical device

A header block configured to be attachable to an implantable medical device, comprising:

• a header block body;
• a connection port disposed in the header block body configured to receive an implantable lead;
• a conductor disposed in the header block body electrically coupled to the connection port at a first end and connectable at a second end to the implantable medical device;
• and
• an impeding device electrically coupled in series along the length of the conductor and disposed within the header block body.

A header block configured to be connectable to an implantable medical device, comprising:

• a header block body;
• a conductor disposed within the header block body between a first end and a second end;
• a connection port connected to the first end and configured to receive an removable or permanent implantable lead;
• wherein the second end is connectable to the implantable medical device or a hermetic feedthrough for the implantable medical device;
• and
• a bandstop filter connected in series along the conductor and disposed within the header block body, the bandstop filter configured to raise the high-frequency impedance of the conductor and comprising a capacitance and an inductance selected to be resonant at or near an MRI RF pulsed frequency or an MRI RF range of pulsed frequencies.