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A method for allowing cardiac signals to be sensed and pacing pulse vectors to be delivered between two or more electrodes. In one embodiment, cardiac signals are sensed and pacing pulse vectors are delivered between least one of a first left ventricular electrode and a second left ventricular elect

A method for allowing cardiac signals to be sensed and pacing pulse vectors to be delivered between two or more electrodes. In one embodiment, cardiac signals are sensed and pacing pulse vectors are delivered between least one of a first left ventricular electrode and a second left ventricular electrode. Alternatively, cardiac signals are sensed and pacing pulse vectors are delivered between different combinations of the first and second left ventricular electrodes and a first supraventricular electrode. In addition, cardiac signals are sensed and pacing pulse vectors are delivered between different combinations of the first and second left ventricular electrode, the first supraventricular electrode and a conductive housing. In an additional embodiment, a first right ventricular electrode is used to sense cardiac signals and provide pacing pulses with different combinations of the first and second left ventricular electrodes, the first supraventricular electrode and the housing.

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What is claimed is: 1. A method, comprising: programming at least one first pacing pulse vector between (1) at least one of a first left ventricular electrode and a second left ventricular electrode in a left ventricular region, and (2) a first supraventricular electrode in a right atrial region; d

What is claimed is: 1. A method, comprising: programming at least one first pacing pulse vector between (1) at least one of a first left ventricular electrode and a second left ventricular electrode in a left ventricular region, and (2) a first supraventricular electrode in a right atrial region; delivering a pacing pulse according to the at least one first programmed pacing pulse vector; and programming at least one second pacing pulse vector between (1) at least one of the first left ventricular electrode and the second left ventricular electrode and (2) a conductive housing of an implantable pulse generator, and where delivering the pacing pulse includes delivering the pacing pulse according to the at least one second programmed pacing pulse vector. 2. The method of claim 1, including: programming at least one sensing vector between (1) at least one of the first left ventricular electrode and the second left ventricular electrode and (2) the first supraventricular electrode; and sensing a cardiac signal according to the at least one programmed sensing vector. 3. A method, comprising: programming at least one first pacing pulse vector between (1) at least one of a first left ventricular electrode and a second left ventricular electrode in a left ventricular region, and (2) a first supraventricular electrode in a right atrial region; delivering a pacing pulse according to the at least one first programmed pacing pulse vector; programming at least one second pacing pulse vector between (1) at least one of the first left ventricular electrode and the second left ventricular electrode and (2) a first right ventricular electrode in a right ventricular region; and delivering a pacing pulse according to the at least one second programmed pacing pulse vector. 4. The method of claim 3, wherein delivering the pacing pulse includes delivering the pacing pulse from the commonly connected first and second left ventricular electrodes to the first right ventricular electrode. 5. The method of claim 3, wherein delivering the pacing pulse includes delivering the pacing pulse between (1) the commonly connected first left ventricular electrode and the second left ventricular electrode and (2) the commonly connected first right ventricular electrode and a housing of an implantable pulse generator. 6. A method, comprising: programming at least one first pacing pulse vector between (1) at least one of a first left ventricular electrode and a second left ventricular electrode in a left ventricular region, and (2) a right ventricular electrode in a right ventricular region; delivering a pacing pulse according to the programmed at least one first pacing pulse vector; programming at least one second pacing pulse vector between (1) at least one of the first left ventricular electrode and the second left ventricular electrode, and (2) a supraventricular electrode in a right atrial region; and delivering a pacing pulse according to the at least one second pacing pulse vector. 7. The method of claim 6, wherein delivering the pacing pulse includes delivering the pacing pulse between (1) the commonly connected first and second left ventricular electrodes and (2) the supraventricular electrode. 8. The method of claim 6, wherein delivering the pacing pulse includes delivering the pacing pulse between (1) the commonly connected first left ventricular electrode and the second left ventricular electrode and (2) the commonly connected supraventricular electrode and a housing of an implantable pulse generator. 9. A method, comprising: programming at least one first pacing pulse vector between (1) at least one of a first left ventricular electrode and a second left ventricular electrode in a left ventricular region, and (2) a right ventricular electrode in a right ventricular region; and delivering a pacing pulse according to the programmed at least one first pacing pulse vector; and wherein the programming the at least one first pacing pulse vector includes programming the at least one first pacing pulse vector between (1) at least one of the first left ventricular electrode, the second left ventricular electrode and a third left ventricular electrode in the left ventricular region, and (2) the first right ventricular electrode. 10. A method, comprising: delivering a pacing level pulse from a first intravascular ventricular defibrillation electrode as a cathode to a first intravascular ventricular pacing/sensing electrode as an anode. 11. The method of claim 10, including positioning the first ventricular defibrillation electrode in a right ventricular region, and the first pacing/sensing electrode in an apex of the right ventricular region. 12. A method comprising: disposing a first electrode in association with a left ventricular region of a heart; disposing a second electrode in association with a right atrial region of the heart; delivering a first pacing pulse between the first and second electrodes; disposing a conductive housing of an implantable pulse generator in association with the heart; delivering a second pacing pulse between the first electrode and the conductive housing of the implantable pulse generator; disposing a third electrode in association with the left ventricular region; coupling the third electrode electrically in common with the first electrode; and wherein the delivering the second pacing pulse includes delivering the second pacing pulse between (1) the commonly-connected first and third electrodes and (2) the conductive housing of the implantable pulse generator. 13. The method of claim 12, further comprising sensing a cardiac signal between: (1) the commonly connected first and third electrodes; and (2) the second electrode. 14. The method of claim 12, further comprising sensing a cardiac signal between the first and second electrodes. 15. A method comprising: disposing a first electrode in association with a left ventricular region of a heart; disposing a second electrode in association with a right ventricular region of the heart; and delivering a first pacing pulse between the first and second electrodes; disposing a third electrode in association with the left ventricular region; coupling the third electrode electrically in common with the first electrode; and wherein the delivering the first pacing pulse includes delivering the pacing pulse between: (1) the commonly connected first and third electrodes; and (2) the second electrode. 16. The method of claim 15, further comprising sensing a cardiac signal between: (1) the commonly connected first and third electrodes; and (2) the second electrode. 17. The method of claim 15, further comprising sensing a cardiac signal between the first and second electrodes. 18. The method of claim 15, further comprising: disposing a conductive housing of an implantable pulse generator in association with the heart; and delivering a second pacing pulse between the first electrode and the conductive housing of the implantable pulse generator. 19. The method of claim 18, further comprising: disposing a third electrode in association with the left ventricular region; coupling the third electrode electrically in common with the first electrode; and wherein the delivering the second pacing pulse includes delivering the second pacing pulse between (1) the commonly-connected first and third electrodes and (2) the conductive housing of the implantable pulse generator. 20. A method comprising: disposing an anodic first electrode within a ventricle at an apex of the ventricle; disposing a cathodic second defibrillation electrode within the ventricle at a location that is more proximal than the first electrode; and delivering a pacing pulse between the anodic first electrode and the cathodic second electrode. 21. A method, comprising: programming at least one first pacing pulse vector between (1) at least one of a first left ventricular electrode and a second left ventricular electrode in a left ventricular region, and (2) a right ventricular electrode in a right ventricular region; delivering a pacing pulse according to the programmed at least one first pacing pulse vector; programming at least one second pacing pulse vector between (1) at least one of the first left ventricular electrode and the second left ventricular electrode, and (2) a supraventricular electrode in a right atrial region; and delivering a pacing pulse according to the at least one second pacing pulse vector. 22. The method of claim 21, wherein the delivering the pacing pulse according to the at least one second pacing pulse vector includes delivering the pacing pulse between (1) the commonly connected first and second left ventricular electrodes and (2) the supraventricular electrode. 23. The method of claim 21, wherein the delivering the pacing pulse according to the at least one second pacing pulse vector includes delivering the pacing pulse between (1) the commonly connected first left ventricular electrode and the second left ventricular electrode and (2) the commonly connected supraventricular electrode and a housing of an implantable pulse generator. 24. A method comprising: disposing a first electrode in association with a left ventricular region of a heart; disposing a second electrode in association with a right atrial region of the heart; delivering a first pacing pulse between the first and second electrodes; disposing a conductive housing of an implantable pulse generator in association with the heart; and delivering a second pacing pulse between the first electrode and the conductive housing of the implantable pulse generator. 25. The method of claim 24, further comprising: disposing a third electrode in association with the left ventricular region; coupling the third electrode electrically in common with the first electrode; and wherein the delivering the second pacing pulse includes delivering the second pacing pulse between (1) the commonly-connected first and third electrodes and (2) the conductive housing of the implantable pulse generator. 26. A method comprising: disposing an anodic first electrode within a ventricle at or near an apex of the ventricle; disposing a cathodic second defibrillation electrode in association with the ventricle at a location that is more proximal than the first electrode; and delivering a pacing pulse between the anodic first electrode and the cathodic second electrode. 27. A method, comprising: delivering a pacing level pulse from a first intravascular ventricular defibrillation electrode as a cathode to a first ventricular pacing/sensing electrode as an anode. 28. The method of claim 27, including positioning the first ventricular defibrillation electrode in a right ventricular region, and the first pacing/sensing electrode at or near an apex of the right ventricular region.