Heuer H, Frenking B, Koch T
Z Kardiol. 1986 Feb;75(2):66-9.
A non-invasive method of testing the suitability of an activity-controlled pacemaker system in patients with VVT-programmable systems is presented. The QT-time controlled TX-pacemaker of a 36-year-old patient was programmed into the VVT-mode. Then the activity-controlled pacemaker (Activitrax) was fixed epicutaneously above the pectoral muscles and two stimulation electrodes were applied above the implanted pacer and the tip of the implanted probe. Thus the external could be made to trigger the implanted system. The frequency profile was recorded with identical loads with QT and/or activity control. For both the frequency-adapted pacemaker systems, the direct comparison yields characteristic frequency profiles: a quick frequency increase and decrease of both Activitrax and load, but a delayed frequency profile of the QT-controlled pacer. Different frequency maxima are rendered by the two pacemakers as a function of the load.
本文介绍了一种用于测试具有VVT可编程系统的患者的活动控制起搏器系统适用性的非侵入性方法。一名36岁患者的QT时间控制型TX起搏器被编程为VVT模式。然后将活动控制起搏器（Activitrax）经皮固定在胸肌上方，并在植入的起搏器上方和植入探头尖端施加两个刺激电极。这样就可以使外部装置触发植入系统。在相同负荷下，通过QT和/或活动控制记录频率曲线。对于这两种频率适应性起搏器系统，直接比较可得出特征性频率曲线：Activitrax和负荷的频率快速上升和下降，但QT控制型起搏器的频率曲线延迟。两个起搏器根据负荷呈现出不同的频率最大值。
