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Rate-adaptive therapy with automatic limiting of maximum pacing rate

  • US 6,839,593 B1
  • Filed: 09/08/2000
  • Issued: 01/04/2005
  • Est. Priority Date: 09/08/2000
  • Status: Expired due to Term
First Claim
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1. A method for operating a rate-adaptive pacemaker wherein measured exertion levels in a patient are mapped to a sensor indicated rate by a rate response curve, comprising:

  • automatically determining the patient'"'"'s maximum exercise capacity as defined by a long-term maximum exertion level by collecting maximum measured exertion levels over a specified period of time;

    wherein the rate response curve is defined such that an exertion level corresponding to the patient'"'"'s maximum exercise capacity would be mapped to a physiologically favorable maximum rate, MAR;

    limiting the sensor indicated rate to a specified maximum sensor indicated rate MSR that is independent from the MAR; and

    , increasing the MSR after a specified time period during which the long-term maximum exertion level is updated.

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