| 摘要 |
<p>A rate adaptive cardiac pacemaker incorporating a switched capacitor filter whose cut-off frequency is varied as a function of heart rate allows respiration-related signals appearing in the intracardiac impedance waveform to be separated from signals relating to systolic events over a frequency range of interest, allowing either or both of the respiration-related signal component or the systolic event component to be used in adjusting the pacing rate. <IMAGE></p> |
