05871512 is referenced by 122 patents and cites 57 patents.

Software programmable device means such as a microprocessor are employed to discriminate between evoked response signals and post-pace polarization signals sensed by an implantable medical device. The polarity of the positive or negative change in voltage in respect of time (or dv/dt) of the waveform incident on the lead electrodes is monitored during a short period of time immediately following a paced event. It has been discovered that the post-pace polarization signal exhibits a relatively constant polarity during the capture detect window, and that the evoked response signal may cause the polarity of post-pace polarization signal to reverse during the capture detect window. The sign of the post-pace polarization polarity, either positive or negative, is determined by the design of the specific output circuitry. The evoked response signal may reverse the polarity of the sensed signal in either case, from positive to negative or from negative to positive, during the time window of interest. When the magnitude of the post-pace polarization is so great that the evoked response does not reverse the polarity of the waveform, discrimination of the evoked response may be achieved by noting an acceleration (or increasing magnitude of dv/dt) in the sensed signal or waveform.

Title
Microprocessor capture detection circuit and method
Application Number
841064
Publication Number
5871512
Application Date
April 9, 1998
Publication Date
February 16, 1999
Inventor
Robert John Schuelke
Lakeville
MN, US
Scott M Morrison
Lino Lakes
MN, US
Brian A Blow
Maple Grove
MN, US
Bradley C Peck
Coon Rapids
MN, US
Michael Todd Hemming
Champlin
MN, US
Agent
Harold R Patton
Thomas F Woods
Assignee
Medtronic
MN, US
IPC
A61N 1/37
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