초록 ▼

Circuitry for quantitatively determining the level of processed heart signals relative to actual sensing sensitivity level (threshold) in an implantable pacemaker. The measurement is useful for adjusting the settable threshold, polarity, filtering or amplification parameter settings for safe operati

Circuitry for quantitatively determining the level of processed heart signals relative to actual sensing sensitivity level (threshold) in an implantable pacemaker. The measurement is useful for adjusting the settable threshold, polarity, filtering or amplification parameter settings for safe operation and noise rejection of the pacemaker.

대표청구항 ▼

An implantable electromedical device for developing predetermined control signals in response to sensed physiological reactions comprising: signal processing means coupled to receive signals corresponding to electrophysiological activity and to develop processed signals in response thereto, the sign

An implantable electromedical device for developing predetermined control signals in response to sensed physiological reactions comprising: signal processing means coupled to receive signals corresponding to electrophysiological activity and to develop processed signals in response thereto, the signal processing means including a sensing detector for developing output signals corresponding to said processed signals; means coupled to the sensing detector for establishing a threshold of response for said sensing detector, wherein the time duration of said output signal from said sensing detector corresponds to the time interval during which a processed signal exceeds said threshold level; sensing margin means for determining a sensing margin as the level of said processed signals relative to said threshold; and means for indicating the degree of difference between the processed signals and said threshold.