Goldreyer B N, Knudson M, Cannom D S, Wyman M G
Pacing Clin Electrophysiol. 1983 Mar;6(2 Pt 2):464-9. doi: 10.1111/j.1540-8159.1983.tb04391.x.
Intracardiac electrogram sensing is the afferent limb of demand pacing systems. Under- and over-sensing at the ventricular level has been demonstrated in almost 50% of implanted unipolar pulse generators, and atrial electrogram sensing problems are more common. A unique dedicated sensor employing noncontacting and circumferentially placed orthogonal electrodes was tested at both the atrial and ventricular levels. Electrograms demonstrated voltages similar to those recorded from contacting electrodes, but with complete far-field rejection of signals from the opposite chamber. Orthogonal electrograms allowed for activation sequencing and capture verification as well.
心内电图感知是按需起搏系统的传入部分。在几乎50%植入的单极脉冲发生器中已证实存在心室水平的感知不足和感知过度，并且心房电图感知问题更为常见。一种采用非接触式且周向放置的正交电极的独特专用传感器在心房和心室水平均进行了测试。电图显示的电压与从接触电极记录的电压相似，但能完全远场抑制来自对侧腔室的信号。正交电图还可用于激活序列分析和夺获验证。
