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Method and device for using impedance measurements based on electrical energy of the heart

  • US 7,778,709 B2
  • Filed: 04/11/2005
  • Issued: 08/17/2010
  • Est. Priority Date: 10/01/2001
  • Status: Active Grant
First Claim
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1. A method of evaluating a condition of a patient having a heart and a thoracic impedance, comprising the steps of:

  • detecting an electrical signal from said heart of said patient using signal circuitry via electrode means arranged and adapted for sensing said electrical signal, while using electrical energy generated by said heart of said patient and no other electrical power for said signal circuitry; and

    determining said thoracic impedance based on said electrical signal.

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