Closed-loop systems and methods for controlling neurostimulation based on far-field cardiac signals sensed by a spinal cord stimulation device

A system for use with an implantable medical system for implant within a patient having a neurostimulation device with a neurostimulation lead, the system comprising:

• a neurostimulation controller operative to selectively deliver neurostimulation using the neurostimulation lead based on a set of adjustable control parameters;
• a neurostimulation lead-based cardiac signal detector operative to sense far-field cardiac electrical signals using the neurostimulation lead and neurostimulation is selectively delivered using the set of adjustable control parameters;
• a cardiac rhythm assessment system operative to derive parameters representative of cardiac rhythm from the far-field cardiac electrical signals sensed using the neurostimulation lead;
• and
• a mapping system operative to correlate the parameters representative of cardiac rhythm with neurostimulation control parameters to map neurostimulation control settings to cardiac rhythm parameters.

A system for use with an implantable medical system for implant within a patient having a neurostimulation device with a neurostimulation lead, the system comprising:

• means for sensing far-field cardiac electrical signals using a lead of the neurostimulation device and selectively delivering neurostimulation using a set of adjustable control parameters;
• means for deriving parameters representative of cardiac rhythm from the far-field cardiac electrical signals sensed using the lead of the neurostimulation device;
• means for correlating the parameters representative of cardiac rhythm with neurostimulation control parameters to map neurostimulation control settings to cardiac rhythm parameters;
• and
• means for controlling the delivery of further neurostimulation based on the mapping of neurostimulation control settings to cardiac rhythm parameters.