Key result
Externally strapped accelerometer- and vibration-based pacemakers underestimated maximal implanted pacemaker rate response by 4%-10% during exercise compared to implanted devices.
Why the study?
Do externally strapped rate adaptive pacemakers accurately reproduce the rate response of identical implanted devices in patients?
Observational (n=10)
Do externally strapped rate adaptive pacemakers accurately reproduce the rate response of identical implanted devices in patients?
Externally strapped activity sensors provide valid chronotropic responses compared to implanted devices, though they modestly underestimate maximal rate increases by 4-10%.
External strapped sensors may underestimate rate response; leaves open their reliability as surrogates for implanted devices in practice and research.
The ability of externally strapped accelerometer- (Excel [Cardiac Pacemakers, Inc.]) and vibration-based (Activitrax [Medtronic, Inc.]) rate adaptive pacemakers to reproduce the rate response of the same implanted devices with identical programming was evaluated in ten patients by ambulatory Holter monitoring. The resting and postexercise external pacemaker rates closely resembled those of the respective implanted devices. During short bursts and more prolonged exercise, both types of strapped-on devices underestimated maximal implanted pacemaker rate response by 4%-10% when programmed to nominal rate adaptive settings. Studies evaluating chronotropic responses from either type of externally strapped activity sensor appear valid, provided the modest attenuation in maximal rate increase by this method is appreciated.
No takes yet. Share an insight, caveat, or question.
Roberts et al. (1995) conducted an observational in Patients with implanted rate adaptive pacemakers (n=10). Externally strapped accelerometer- and vibration-based rate adaptive pacemakers vs. Implanted devices with identical programming was evaluated on Maximal pacemaker rate response during exercise. Externally strapped accelerometer- and vibration-based pacemakers underestimated maximal implanted pacemaker rate response by 4%-10% during exercise compared to implanted devices.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: