Patent ID: 7621906

Claim:
A system, comprising: an implantable drug delivery device including: a drug storage device including a polymeric matrix made of an electrically sensitive polymer having a structure that is electrically controllable by applying an electric field on the electrically sensitive polymer, the structure including an electrically controllable porosity or an electrically controllable binding affinity; a drug embedded in the polymeric matrix; and a plurality of electrodes, coupled to the drug storage device, the plurality of electrodes to apply a plurality of electric fields each on a portion of the electrically sensitive polymer and having an individually controllable amplitude; and an implantable lead including a proximal end including a lead connector providing for a detachable connection to an implantable cardiac rhythm management (CRM) device and a distal end at the implantable drug delivery device, the implantable lead providing for electrical connections between the implantable CRM device and the plurality of electrodes to allow a plurality of drug delivery signals controlling the application of the plurality of electric fields to be delivered from the implantable CRM device to the plurality of electrodes.