Patent ID: 8373384

Claim:
An implantable cardiac stimulation device comprising: at least one lead adapted to be implanted adjacent a 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 has a first surface adjacent the feedthrough structure and a second surface and defines an opening extending between the first and second surface through which the at least one feedthrough wire extends so as communicatively couple the controller to the at least one lead; and an isolation structure that is positioned on the second surface of the mechanical support so as to cover the at least one feedthrough wire to electrically insulate the at least one feedthrough wire.