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Detecting worsening heart failure based on fluid accumulation with respiratory confirmation

  • US 8,632,473 B2
  • Filed: 01/30/2009
  • Issued: 01/21/2014
  • Est. Priority Date: 01/30/2009
  • Status: Active Grant
First Claim
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1. A method for confirming an indication of worsening heart failure in a patient, the indication based on monitoring a fluid index of the patient by means of intrathoracic impedance measurements made by a medical device, and the method comprising:

  • monitoring, with an activity sensor of the medical device, an activity level of the patient;

    triggering respiration monitoring, in response to the indication of worsening heart failure, the respiration monitoring also by means of intrathoracic impedance measurements made by the medical device;

    wherein the respiration monitoring accounts for an affect of the activity level as monitored by the activity sensor; and

    when the respiration monitoring indicates increased respiration rates and decreased respiration volumes, the indication of worsening heart failure in the patient is confirmed.

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