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Rate adaptive cardiac rhythm management device using transthoracic impedance

  • US 20030105499A1
  • Filed: 10/08/2002
  • Published: 06/05/2003
  • Est. Priority Date: 02/27/1998
  • Status: Abandoned Application
First Claim
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1. A method of determining transthoracic impedance in a cardiac rhythm management device, the method comprising:

  • repeatedly delivering a multiple phase stimulus to a thorax region of a patient; and

    demodulating more than one phase of the multiple phase stimuli to obtain sample points of a response signal including transthoracic impedance information.

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