Fault tolerant implantable medical system

摘要

The disclosure describes implantable medical systems that respond to occurrence of a lead-related condition by utilizing an elongated coil electrode in defining an alternative pacing therapy vector to maintain optimal drain of an IMD power supply. An exemplary system includes a medical electrical lead having an elongated electrode and an improved sensing and therapy delivery circuitry to provide the alternative pacing therapy vector responsive to the lead-related conditions. The system reconfigures the operation of the sensing and therapy delivery circuitry triggered by the switch to the alternative pacing therapy vector.

主权项

1. A method for operating an implantable medical system having a medical electrical lead, comprising:
providing a therapy through a first vector including a first electrode of the medical electrical lead; detecting a lead-related condition associated with the first vector; responsive to detecting the lead-related condition, reconfiguring the therapy for delivery through a second vector including an alternate electrode of the medical electrical lead, the alternate electrode having a first section and a second section; and delivering the reconfigured therapy through the second vector, wherein the reconfigured therapy is directed through the second section of the alternate electrode but not the first section.