专利名称：Sen margin evaluation system and method for u same
发明人：Robert DeCote, Jr.,Peter P. Tarjan
中年女士短发申请号：US06/693675
申请日：19850122
公开号：US04640285A
公开日：
19870203
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摘要：The n margin evaluation system and method for u of same is bad upon (1) the interposition of a variable broad-band attenuator between an implanted cardiac pacer lead t and a pacer which is about to be implanted and (2) the inclusion of a pacer pul detector at the pacer port. In u, the pacer is first programmed to a standby mode and a condition of 100% inhibition with the attenuator t to 0 dB. This affirms that the pacer's n amplifier can n the cardiac signal. Then, attenuation is incrementally added until the pacer just begins to output. The attenuation ratio
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(input/output) at this point is a direct measure of the ratio effective between the
patient's cardiac signal and the pacer's nsing threshold, i.e., the n margin. The advantage of this technique is that by using a broad-band attenuator, measurement inaccuracies due to the convolution of the cardiac signal's spectral content with a pacer system analyzer and a pacer n amplifier's disparate narrow-band frequency respon are avoided. The patient's cardiac signal rves as the test waveform generator for the pacer that is about to be implanted in his body and the n amplifier'frequency respon is identically that of the pacer about to be implanted.
申请人：CORDIS CORPORATION
书愤其二
代理人：Henry W. Collins,Thomas R. Vigil 更多信息请下载全文后查看大队长竞选ppt
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