Sermasi S, Marconi M, Marzaloni M
Department of Cardiology, Ospedale Infermi, Rimini-Nord, Italy.
Pacing Clin Electrophysiol. 1990 Dec;13(12 Pt 2):1751-4. doi: 10.1111/j.1540-8159.1990.tb06884.x.
The rate adaptive TX* pacemaker uses the evoked QT interval as an indicator of physiological demand. In order to obtain a rate adaptation close to physiological patterns we used in the past, in each patient, on the slope value and/or the T wave sensing window, controlling via exercise stress testing and Holter the results achieved. It was an expensive method, but the system produced effective rate responsive pacing. The new series of TX* pacemakers (Quintech 919 and Rhythmyx), beside the dynamic slope feature, are equipped with a 1-hour heart rate Holter (HRH) that can be used during effort without the need for manually recording the heart rate. In this mode TX* pacemakers calculate the average heart rate over 20-second periods and stores the values continuously for 1 hour. In addition, a 24-hour HRH is available, which calculates the average heart rate over 7.5-minute periods, showing heart rate trend during the last day prior to interrogation. Each HRH can be accessed by the programmer and printed out. Using four Quintech 919* and five Rhythmyx units, the inbuilt HRH proved its utility by making the heart rate adaptation checking procedure easier, faster, and more economic.
频率自适应TX起搏器将诱发QT间期用作生理需求的指标。为了实现与我们过去所采用的生理模式相近的频率适应，在每位患者身上，针对斜率值和/或T波感知窗口，通过运动负荷试验和动态心电图监测来控制所取得的结果。这是一种昂贵的方法，但该系统产生了有效的频率应答起搏。新一代的TX起搏器（Quintech 919和Rhythmyx），除了具备动态斜率功能外，还配备了一个1小时心率动态心电图（HRH），可在运动期间使用，无需手动记录心率。在这种模式下，TX起搏器计算20秒时间段内的平均心率，并连续存储这些值达1小时。此外，还有一个24小时HRH，它计算7.5分钟时间段内的平均心率，显示在进行问询前最后一天的心率趋势。每个HRH均可由编程器访问并打印出来。通过使用四个Quintech 919和五个Rhythmyx装置，内置的HRH通过使心率适应检查程序更简便、快速且经济，证明了其效用。
