Patent ID: 7720529

Claim:
A control system for an implantable cardiac therapy device wherein the control system comprises a microcontroller, the implantable therapy device defining a plurality of sensing vectors including at least one impedance sensing vector and the therapy device operating under a set of a plurality of variable operating parameters that define conditions for delivery of therapy by the device and wherein the microcontroller evaluates a signal quality from the at least one impedance sensing vector and, if the quality of the signals is sufficient to discern valvular events, the microcontroller adjusts the set of operating parameters to dynamically improve cardiac performance, including synchrony with valvular events, and if the quality is insufficient to discern valvular events, but sufficient to discern peaks, the microcontroller adjusts the set of operating parameters to dynamically improve cardiac performance independent of valvular events, and if the quality is insufficient to discern peaks, the microcontroller adjusts the set of operating parameters to induce cardiac performance towards a defined performance goal.