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Method and apparatus for capture detection

  • US 6,477,422 B1
  • Filed: 03/22/2000
  • Issued: 11/05/2002
  • Est. Priority Date: 03/22/2000
  • Status: Expired due to Fees
First Claim
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1. A method of capture detection, comprising:

  • delivering a pacing pulse using an electrode;

    following delivery of a pacing pulse, sensing an electrical signal using the electrode and monitoring the amplitude of the sensed electrical signal over time;

    determining a polarization related amplitude of the sensed electrical signal;

    employing the determined polarization related amplitude to define a variable sensing threshold which decreases with time; and

    detecting capture by the delivered pacing pulse responsive to the amplitude of the sensed electrical signal exceeding the variable sensing threshold for a defined duration.

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