Patent ID: 8160708

Claim:
An implantable cardiac stimulation device comprising: at least one lead adapted to be implanted adjacent the patient's heart so as to delivery therapy to the patient's heart and so as to sense electrical activity indicative of the function of the patient's heart; a controller that receives signals from the at least one lead indicative of the electrical activity which is indicative of the function of the patient's heart wherein the controller also induces the delivery of therapeutic electrical stimulation to the patient's heart via the at least one lead; a casing that defines a cavity that houses the controller wherein the casing is adapted to be implanted within the body of the patient and inhibit the entry of body fluids into the cavity of the casing that contains the controller, wherein the casing defines a feedthrough opening through which the at least one feedthrough wire extends so as to be communicatively coupled to the controller and wherein the casing defines a ground for the implantable cardiac stimulation device; a feedthrough structure that is positioned within the feedthrough opening wherein the feedthrough structure comprises the at least one feedthrough wire which is coupled to the at least one lead; a mechanical support having a first surface that is coupled to the feedthrough structure via the first surface so as to be positioned within the casing cavity, wherein the mechanical support defines an interior volume and wherein the mechanical support defines an opening through which the at least one feedthrough wire extends so as communicatively couple the controller to the at least one lead; and at least one filter device positioned within the interior volume of the mechanical support wherein the at least one filtering device is electrically coupled to the at least one feedthrough wire so as to filter unwanted signals received by the at least one feedthrough wire to inhibit transmission of the unwanted signals to the controller and wherein the at least one filter device is coupled to ground via the first surface of the mechanical support.