Presented in part at the 10th Annual Scientific Session of NASPE in Toronto, May 1989.
Stability of Pacing Threshold, Impedance, and R Wave Amplitude at Rest and During Exercise
Article first published online: 5 OCT 2007
Pacing and Clinical Electrophysiology
Volume 13, Issue 12, pages 1602–1608, December 1990
How to Cite
SCHUCHERT, A., KUCK, K.-H. and BLEIFELD, W. (1990), Stability of Pacing Threshold, Impedance, and R Wave Amplitude at Rest and During Exercise. Pacing and Clinical Electrophysiology, 13: 1602–1608. doi: 10.1111/j.1540-8159.1990.tb06861.x
- Issue published online: 5 OCT 2007
- Article first published online: 5 OCT 2007
- Received November 9, 1989; revision February 28, 1990; revision September 12, 1990; accepted September 19, 1990
- pacemaker programming;
- exercise testing;
- pacing threshold;
- R wave amplitude;
- steroid-eluting lead
SCHUCHERT, A., ET AL.: Stability of Pacing Threshold, Impedance, and R Wave Amplitude at Rest and During Exercise. The pacing threshold of the human heart may be altered by physiological factors such as physical exercise. These changes may influence the individual programming of a pacemaker, since pacemakers can be programmed at pulse amplitudes of 2.5 volts and Jess. We investigated 22 patients with a multiprogrammable ventricular demand pacemaker 3 months after implantation; 16 patients had received a steroid-eluting lead and six patients had an Elgiloy lead. Parameters measured at rest and immediately after exercise were: Voltage threshold at pulse durations between 0.05 and 0.6 ms, impedance, R wave amplitude and energy consumption for the pacing threshold at 0.5 ms pulse duration. All patients performed a symptom limited supine bicycle exercise test. None of the investigated parameters showed a significant difference between rest and exercise, neither for the steroid eluting lead nor for the Elgiloy lead. The data suggest that the individual programming of a pacemaker adapted to the measurements at rest is also reliable and safe during exercise.