| 摘要 |
<p>This invention relates to a device capable of automatically adjusting the threshold detection level of a detector unit for detecting physiological events, e.g. heart contractions, comprising: sensor means (2, 10) for sensing a cardiac signal, sampling (5) and memory (6) for collecting and storing samples of said cardiac signal, whereby it further comprises: timer (7) for starting the sampling means (5) and stopping the sampling means (5) after a predetermined time, analysis means (8) for the analysis of the stored cardiac signal to generate a first set of values which represent physiological events, such as mean peak signal value, the average maximum signal slope or an integrated signal value, analysis means (8) for calculating at least one derived parameter from the whole of said first set of values and analysis means for automatically varying the threshold detection level of the sensor means (2, 10) as a function of said at least one derived parameter. <IMAGE></p> |
