Matula M, Hölzer K, Zitzmann E, Schön H, Alt E
I. Medizinische Klinik, Klinikum rechts der Isar, TU München.
Z Kardiol. 1993 Feb;82(2):108-15.
New activity pacemaker systems with the principle of sensing low-frequency acceleration in the anterior-posterior axis are currently under clinical evaluation. We compared the pacemaker system Relay, which represents this new generation of accelerometer controlled devices, with conventional activity systems sensing pressure and vibration. Ten pacemaker patients with implanted Activitrax, Sensolog or Relay pacemakers and 10 healthy volunteers with externally strapped-on pacemakers were studied. The aim was to evaluate the systems' ability to distinguish different workloads during graded treadmill testing with changes in speed and/or slope. The rate adaption of the new acceleration sensing pacemakers was found to be more adequate compared to vibration and pressure-sensing pacemakers when only the slope of the treadmill was varied. The acceleration-sensing pacemaker adjusted its rate according to the workload largely independent from the type of stress (n.s.). With the vibration and pressure-sensing pacemakers, however, significant differences (p < 0.05) were seen between rate adaption in the two stress test modes. The new generation of acceleration-sensing pacemakers has certain advantages over conventional vibration-sensitive systems in terms of a higher sensitivity to varying workloads and higher specificity to the type of exercise performed.
目前正在对基于前后轴低频加速度感应原理的新型活动起搏器系统进行临床评估。我们将代表新一代加速度计控制设备的Relay起搏器系统与传统的感应压力和振动的活动系统进行了比较。研究了10名植入了Activitrax、Sensolog或Relay起搏器的起搏器患者以及10名佩戴外部绑带式起搏器的健康志愿者。目的是评估这些系统在速度和/或坡度变化的分级跑步机测试中区分不同工作量的能力。当仅改变跑步机的坡度时，发现新型加速度感应起搏器的频率适应比振动和压力感应起搏器更合适。加速度感应起搏器根据工作量调整其频率，很大程度上与压力类型无关（无显著性差异）。然而，对于振动和压力感应起搏器，在两种压力测试模式下的频率适应之间存在显著差异（p < 0.05）。新一代加速度感应起搏器在对不同工作量的更高敏感性和对所进行运动类型的更高特异性方面比传统的振动敏感系统具有一定优势。
