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Methods and apparatus for detecting and/or monitoring heart failure

  • US 7,020,521 B1
  • Filed: 11/08/2002
  • Issued: 03/28/2006
  • Est. Priority Date: 11/08/2002
  • Status: Expired due to Fees
First Claim
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1. A method for use with an implantable device, the method comprising:

  • extracting muscle sympathetic nerve activity over a period of time from a sensed implantable electrode signal; and

    determining a level of heart failure based on the extracted muscle sympathetic nerve activity;

    wherein the muscle sympathetic nerve activity is extracted by amplifying the sensed implantable electrode signal in the range between about 10,000 and about 100,000 and bandpass filtering the amplified activity signal on a musde sympathetic nerve activity bandpass range.

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