CLOSED-LOOP SYSTEMS AND METHODS FOR CONTROLLING NEUROSTIMULATION BASED ON FAR-FIELD CARDIAC SIGNALS SENSED BY A SPINAL CORD STIMULATION DEVICE

摘要

Techniques are provided for controlling spinal cord stimulation (SCS) or other forms of neurostimulation. Far-field cardiac electrical signals are sensed using a lead of the SCS device and neurostimulation is selectively delivering using a set of adjustable SCS control parameters. Parameters representative of cardiac rhythm are derived from the far-field cardiac electrical signals. The parameters representative of cardiac rhythm are correlated with SCS control parameters to thereby map neurostimulation control settings to cardiac rhythm parameters. The delivery of further neurostimulation is then controlled based on the mapping of neurostimulation control settings to cardiac rhythm parameters to, for example, address any cardiovascular disorders detected based on the far-field cardiac signals. In this manner, a closed loop control system is provided to automatically adjust SCS control parameters to respond to changes in cardiac rhythm such as changes associated with ischemia, arrhythmia or heart failure.

主权项

1. A method for use with an implantable medical system for implant within a patient having a neurostimulation device, the method comprising:
sensing far-field cardiac electrical signals using a lead of the neurostimulation device and selectively delivering neurostimulation using a set of adjustable control parameters; deriving parameters representative of cardiac rhythm from the far-field cardiac electrical signals sensed using the lead of the neurostimulation device; correlating the parameters representative of cardiac rhythm with neurostimulation control parameters to map neurostimulation control settings to cardiac rhythm parameters; and controlling the delivery of further neurostimulation based on the mapping of neurostimulation control settings to cardiac rhythm parameters.