CAPTURE DETECTION CIRCUIT

专利名称：CAPTURE DETECTION CIRCUIT

发明人：PECK, Bradley, C.,BLOW, Brian, A.,MORRISON,

Scott, M.,HEMMING, Michael, T.,SCHUELKE,Robert, J.

申请号：EP98920894.7申请日：19980428公开号：EP0988087B1公开日：20030122

摘要：The present invention permits discrimination between evoked response signalsand post-pace polarization signals sensed by an implantable medical device by noting thepolarity of the positive or negative change in voltage in respect of time (or dv/dt) of thewaveform incident on the lead electrodes during a short period of time immediatelyfollowing a paced event. It has been discovered that the post-pace polarization signalexhibits a relatively constant polarity during the capture detect window, and that theevoked response signal may cause the polarity of post-pace polarization signal toreverse during the capture detect window. The sign of the post-pace polarizationpolarity, either positive or negative, is determined by the design of the specific outputcircuitry. The evoked response signal may reverse the polarity of the sensed signal ineither case, from positive to negative or from negative to positive, during the timewindow of interest. In another embodiment of the present invention, and when themagnitude of the post-pace polarization is so great that the evoked response does notreverse the polarity of the waveform, discrimination of the evoked response is achievedby noting an acceleration (or increasing magnitude of dv/dt) in the sensed signal or

waveform.

申请人：MEDTRONIC INC

地址：US

国籍：US

代理机构：Hughes, Andrea Michelle

更多信息请下载全文后查看