发明名称 |
Method and apparatus for adjusting cardiac event detection threshold based on dynamic noise estimation |
摘要 |
An implantable cardiac rhythm management (CRM) device includes a sensing and detection circuit that senses at least one cardiac signal and detects cardiac electrical events from the sensed cardiac signal using a detection threshold that is adjusted based on a dynamic noise estimation. The sensed cardiac signal is filtered to produce a filtered cardiac signal having a signal frequency band and a noise signal having a noise frequency band. The noise frequency band is substantially different from the signal frequency band. A dynamic noise floor is produced based on the noise signal and used as the minimum value for the detection threshold. A cardiac electrical is detected when the amplitude of the filtered cardiac signal exceeds the detection threshold.
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申请公布号 |
US7515955(B2) |
申请公布日期 |
2009.04.07 |
申请号 |
US20060557318 |
申请日期 |
2006.11.07 |
申请人 |
CARDIAC PACEMAKERS, INC. |
发明人 |
LINDER WILLIAM J.;MANIAK JEREMY;BALCZEWSKI RON A. |
分类号 |
A61B5/0402 |
主分类号 |
A61B5/0402 |
代理机构 |
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