Related Experiment Videos
[Body movement as pacemaker induction value: comparison of 2 activity-triggered pacemakers]
K Stangl1, A Wirtzfeld, O Lochschmidt
1I. Med. Klinik TU München.
Zeitschrift Fur Kardiologie
|April 1, 1988
Summary
The Sensolog (S) pacemaker demonstrated superior workload discrimination compared to the Activitrax (A) pacemaker in patient studies. Both activity-triggered pacemakers showed similar susceptibility to external noise during daily activities.
Area of Science:
- Biomedical Engineering
- Cardiology
- Medical Devices
Background:
- Activity-triggered pacemakers (ATPs) aim to provide physiological rate response.
- Comparing the performance of different ATPs is crucial for clinical decision-making.
Purpose of the Study:
- To compare the rate behavior of Activitrax (A) and Sensolog (S) activity-triggered pacemakers.
- To evaluate their performance under bench tests, ergometric conditions, and daily life.
- To assess their susceptibility to external noise.
Main Methods:
- Bench tests with controlled vibration (frequency and energy variation).
- Treadmill exercise tests in 10 patients with S and 10 with A.
- Holter-ECG monitoring during daily life and environmental noise exposure in 5 patients per group.
Main Results:
- Both pacemakers exhibited frequency-selective operation (2-70 Hz) with peak sensitivity at 10 Hz.
- Sensolog (S) showed significantly better discrimination of workload changes during treadmill exercise.
- The pacing rate of S correlated linearly with workload (y = 0.27x + 85.8, r = 0.92), while A's rate was largely independent (y = 0.04x + 89.8, r = 0.2).
- Susceptibility to external noise (car, streetcar, train) was similar between S and A.
Conclusions:
- Sensolog (S) offers superior rate adaptation to physical activity compared to Activitrax (A).
- Both pacemakers exhibit comparable resilience to common environmental noise.
- These findings have implications for pacemaker selection and patient management.