| 摘要 |
An implantable heart stimulator has an electrode lead adapted to detect electrical heart signals and a cardiac activity sensor connected to the electrode lead for detecting heart signals above a sensitivity level. A heart signal classifier is also connected to the electrode lead, and classifies the incoming heart signals in a histogram with regard to their respective peak amplitude values. The heart signal classifier has a sensitivity level lower than the sensitivity level of the cardiac activity detector so that incoming heart signals are included in the histogram data which are below the level that would be detected by the cardiac activity detector. An analyzer in communication with the classifier and the activity detector analyzes the histogram data and adjusts the sensitivity level of the activity detector dependent on the histogram data. |
