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Method and apparatus for using heart rate variability as a safety check in electrical therapies

  • US 8,831,724 B2
  • Filed: 01/26/2010
  • Issued: 09/09/2014
  • Est. Priority Date: 01/18/2005
  • Status: Expired due to Fees
First Claim
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1. A method for delivering electrical stimulation to a patient, comprising:

  • sensing a cardiac signal;

    measuring a variance in cardiac cycle lengths over a predetermined period of time to produce a heart rate variability (HRV) parameter based on the sensed cardiac signal;

    delivering electrical stimulation pulses by executing at least a remodeling control therapy (RCT) pacing algorithm;

    stopping the execution of the RCT pacing algorithm and starting an execution of a cardiac resynchronization therapy (CRT) pacing algorithm or a bradycardia pacing algorithm when the HRV parameter falls out of a safety window; and

    adjusting the safety window dynamically based on the patient'"'"'s heart rate.

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