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Implantable cardiac stimulating device with optimized demand

  • US 6,892,096 B2
  • Filed: 01/28/2002
  • Issued: 05/10/2005
  • Est. Priority Date: 04/30/1999
  • Status: Expired due to Term
First Claim
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1. A method for extending battery life in a cardiac pacing device that includes a pacing supply capacitor connected to a switching power supply and that is adapted to provide a series of pacing pulses from the pacing supply capacitor, the method comprising:

  • selecting a pacing supply operating frequency for the switching power supply to reduce a current required to recharge the pacing supply capacitor before a subsequent pacing pulse in the series of pacing pulses;

    monitoring battery charge depletion that results in increasing charge times for the pacing supply capacitor; and

    increasing the pacing supply operating frequency to compensate for the increasing charge times of the pacing supply capacitor.

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