Patent ID: 6961615

Claim:
In an implantable medical device for implant within a patient, the device having a plurality of sensors and a control unit for processing signals from the sensors, a method performed by the control unit comprising: receiving signals from the sensors representative of physiological parameters of the patient detected at sub-maximal exertion levels; estimating the ventilatory response of the patient at maximum exertion based on the signals detected at sub-maximal exertion levels; and controlling at least one function of the device based on the estimated ventilatory response. wherein the step of receiving signals representative of physiological parameters of the patient includes the step of receiving signals representative of Heart Rate, Arterial Oxygen Saturation, Right Ventricular O 2 , Stroke Volume, Tidal Volume, and Respiration Rate; and wherein the step of estimating ventilatory response includes the step of calculating VR =(Tidal Volume−Respiratory Rate) /(α×(Arterial O 2 Saturation−Right Ventricular O 2 ) ×(Heart Rate)×(Stroke Volume)).