Energy efficient multiple sensor cardiac pacemaker

Details Energy efficient multiple sensor cardiac pacemaker Energy efficient multiple sensor cardiac pacemaker

A - Human Necessities

61

N

A61N 1/365 (2006.01) A61N 1/368 (2006.01)

Patent

CA 2131035

A multiple sensor cardiac pacemaker blends the outputs from a fast-reacting Activity sensor and a slower-reacting Minute ventilation sensor to achieve an optimally desirable pacing rate. The pacemaker conserves battery energy by forcing the Minute Ventilation sensor output to be at its minimum value by disabling the Minute Ventilation algorithm for a predetermined time period when the Activity sensor is at its minimum observed value. Power is conserved because the Minute Ventilation sensor and associated algorithms which normally consume power to operate the circuitry, and to measure impedance are disabled temporarily only during selected periods where the Activity sensor is at its minimum observed value, thereby maintaining optimal blending of the pacemaker sensor outputs in achieving the desired pacing rates.

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