Implantable cardioverter-defibrillator having two spaced apart shocking electrodes on housing

1. A method of forming a plurality of depolarization vectors for an implantable cardioverter-defibrillator, the method comprising the steps of:

providing a cardioverter-defibrillator canister having a first electrode and a second electrode disposed upon a portion of the cardioverter-defibriflator canister, and an electrical circuit contained within the cardioverter-defibrillator canister that electrically couples to the first electrode and the second electrode, the electrical circuit being adapted to provide an output pulse for cardiac stimulation using one of the first electrode and the second electrode as an anode and the other as a cathode;

providing a lead electrode that is electrically coupled to the electrical circuit contained within the cardioverter-defibrillator canister; and

positioning the cardioverter-defibrillator canister and the lead electrode subcutaneously over a patient's ribcage.

2. The method of claim 1 , wherein the first electrode and the second electrode form a depolarization vector with respect to a patient's heart.

3. The method of claim 2 , wherein the electrical circuit is configured to receive sensory information via at least one pair of electrodes including the first electrode, second electrode or lead electrode.

4. The method of claim 1 , wherein the first electrode and the lead electrode form a depolarization vector with respect to a patient's heart.

5. The method of claim 1 , wherein the first electrode and second electrode form a depolarization vector with the lead electrode with respect to a patient's heart.

6. The method of claim 1 , wherein the first electrode and the lead electrode form a depolarization vector with the second electrode with respect to a patient's heart.

7. The method of claim 1 , wherein the first electrode, second electrode and lead electrode can emit an energy for shocking a patient's heart.

8. The method of claim 1 , wherein the electrical circuit is programmed prior to implantation into the patient.

9. The method of claim 8 , wherein the electrical circuit is capable of being further programmed after implantation into the patient.

10. The method of claim 1 , wherein the electrical circuit can provide a cardioversion-defibrillation energy to a patient's heart.

11. The method of claim 10 , wherein the electrical circuit can further provide multiphasic waveform cardiac pacing for the patient's heart.

12. The method of claim 10 , wherein the electrical circuit can further provide monophasic waveform cardiac pacing for the patient's heart.

13. An implantable cardioverter-defibrillator for subcutaneous positioning over a patient's ribcage, the implantable cardioverter-defibrillator comprising:

a housing having a first end and a second end;

a first electrode disposed upon the first end of the housing;

a second electrode disposed upon the second end of the housing; and

an electrical circuit located within the housing, wherein the electrical circuit is electrically coupled to the first electrode and the second electrode such that the electrical circuit provides a cardiac stimulus output to the patient using one of the first electrode and the second electrode as an anode and the other as a cathode;

wherein the first and second electrodes are spaced apart such that a depolarization vector is formed with respect to a patient's heart between the first and second electrodes.

14. The implantable cardioverter-defibrillator of claim 13 , further comprising a lead electrode electrically coupled to the electrical circuit located within the housing.

15. The implantable cardioverter-defibriulator of claim 14 , wherein the first electrode and the lead electrode form a depolarization vector with respect to a patient's heart.

16. The implantable cardioverter-defibrillator of claim 14 , wherein the first electrode and second electrode form a depolarization vector with the lead electrode with respect to a patient's heart.

17. The izuplantable cardioverter-defibrillator of claim 14 , wherein the first electrode and the lead electrode form a depolarization vector with the second electrode with respect to a patient's heart.

18. The implantable cardioverter-defibriflator of claim 14 , wherein the first electrode, second electrode and lead electrode can emit a energy for shocking a patient's heart.

19. The implantable cardioverter-defibrillator of claim 14 , wherein the first electrode, second electrode and lead electrode can receive sensory information.

20. An implantable cardioverter-defibrillator for subcutaneous positioning over a patient's ribcage, the implantable cardioverter-defibrillator comprising:

a housing having a first end and a second end;

a first electrode disposed upon the first end of the housing;

a second electrode disposed upon the second end of the housing;

an electrical circuit located within the housing, the electrical circuit adapted to provide a depolarization output pulse sufficient to cause depolarization of cardiac tissue from an implanted position, wherein the electrical circuit is electrically coupled to the first electrode and the second electrode such that one of the first electrode and second electrode is the anode and the other is the cathode for a depolarization output pulse of the electrical circuit; and

a lead electrode electrically coupled to the electrical circuit located within the housing;

wherein the spacing between the first and second electrodes is such that a depolarization vector is formed with respect to a patient's heart between the first and second electrodes when a depolarization output pulse from the electrical circuit is output through the first electrode and the second electrode.

21. The implantable cardioverter-defibrillator of claim 20 , wherein the lead electrode is coupled to the electrical circuit located within the housing through a connection port.

22. The implantable cardioverter-defibrillator of claim 20 , wherein the first electrode, second electrode and lead electrode can emit an energy for shocking a patient's heart.

23. The implantable cardioverter-defibrillator of claim 20 , wherein the electrical circuit is further adapted to receive sensory information.

24. The implantable cardioverter-defibrillator of claim 23 , wherein the sensory information that is receivable concerns a patient's blood glucose level.

25. The implantable cardioverter-defibrillator of claim 23 , wherein the sensory information that is receivable concerns a patient's respiratory rate.

26. The implantable cardioverter-defibrillator of claim 23 , wherein the sensory information that is receivable concerns a patient's blood oxygen content.

27. The implantable cardioverter-defibrillator of claim 23 , wherein the sensory information that is receivable concerns a patient's blood pressure.

28. The implantable cardioverter-defibrillator of claim 23 , wherein the sensory information that is receivable concerns a patient's activity.

29. The implantable cardioverter-defibrillator of claim 20 , wherein the electrical circuit is configured to receive sensory information from at least one pair of electrodes chosen from the lead electrode and the first and second electrodes, the sensory information concerning a patient's cardiac output.

30. The implantable cardioverter-defibrillator of claim 20 , wherein the first electrode and the lead electrode form a depolarization vector with respect to a patient's heart.

31. The implantable cardioverter-defibrillator of claim 20 , wherein the first electrode and second electrode form a depolarization vector with the lead electrode with respect to a patient's heart.

32. The implantable cardioverter-defibrillator of claim 20 , wherein the first electrode and the lead electrode form a depolarization vector with the second electrode with respect to a patient's heart.

33. The implantable cardioverter-defibrillator of claim 20 , wherein the electrical circuit is programmed prior to implantation into the patient.

34. The implantable cardioverter-defibrillator of claim 33 , wherein the electrical circuit is capable of being further programmed after implantation into the patient.

35. The implantable cardioverter-defibrillator of claim 20 , wherein the electrical circuit can provide a cardioversion-defibrillation energy to a patient's heart.

36. The implantable cardioverter-defibrillator of claim 35 , wherein the electrical circuit can further provide multiphasic waveform cardiac pacing for the patient's heart.

37. The implantable cardioverter-defibrillator of claim 35 , wherein the electrical circuit can further provide monophasic waveform cardiac pacing for the patient's heart.