Telemetry of Programmed and Measured Data in Pacing System Evaluation and Follow‐up

Abstract

CASTELLANET MJ, ET AL: Telemetry of programmed and measured data in pacing pacing system evaluation and follow-up. Telemetry of programmed and measured data is an important feature of many pacemakers currently used in clinical practice. The ability to receive non-invasive data from the implanted dance constitutes a major advantage for the long-term follow-up of the patients and of device performance. There are numerous types of data retrievable via telemetry: parameters of device characteristics (output, battery longevity, impedance, etc), event recorders or counters, event tnarkers, and endocardial electrograms. Ideally, this inprmatiorj should be beneficial in the longitudinal surveilance of modern pacemakers. (J Electrophvsiol, 1:360-375, 1987) pacemaker telemetry, measured data, follow-up, programming The modern pacemaker now provides a wide variety of information regarding the pacemaker system. A thorough understanding of this information is necessary for adequate evaluation and follow-up of the pacemaker patient. This article provides an overview of the programmed and measured data available in some of the representative pacemakers currently used. It provides a discussion of this information and how this information can be collected and filed in an organized fashion over the life span of the pacemaker system. facturer {nominal settings) and are adjusted appropriately by the physician at implant. Figure 2 illustrates the Intermedics Cosmos® Model 283-01+ showing the programmed data and the measured telemetry data. In both these systems, the programmed data includes the mode, rate, ventricular and atrial refractory periods, pulse width, amplitude, sensitivity, AV interval, and maximum tracking rate. The Pacesetter system has a programmable blanking period, whereas the Intermedics system automatically programs a blanking period depending on the atrial output and the ventricular sensitivity settings. These are the selected values that have been programmed into the pacemaker and can be changed at intervals as needed.The measured data is telemetry data that is actually measured by the pacemaker and indicates exactly how the pacemaker is performing at that time. The measured data parameters provided vary between pacemaker manufacturers. As noted in Figure 1, the Pacesetter measured data indicates the actual pacemaker rate with and without the magnet. It provides pulse voltage, pulse current, pulse energy, pulse charge, and calculated lead impedance in both the atrial and ventricular channels.

Pacemaker Troubleshooting and Follow-up

“…[7][8][9][10][11] All three parameters are interrelated. [7][8][9][10][11] All three parameters are interrelated.…”

Electrotherapy of the Heart

“…An encoder and a program output stage make available the actual pacing and control parameters, the operating parameters (battery current, battery voltage, internal battery resistance, electrode resistance, patient information, etc. ), as wen as intracardiac EGM signals and markers [40].…”