Accelerometer-based activity sensing by an insertable cardiac monitor in ambulatory patients: a sub-analysis of the LUX-Dx TRENDS study
Key result
Insertable cardiac monitors show potential for continuous activity tracking in ambulatory patients without device indications.
Why the study?
Continuous activity monitoring using accelerometer-based motion detection in ambulatory patients without pacemaker or ICD indications may provide useful clinical information.
Key Points
- To evaluate the feasibility and utility of continuous accelerometer-based activity monitoring using insertable cardiac monitors in ambulatory patients without indications for pacemakers or defibrillators.
- Conducted a sub-analysis of the LUX-Dx TRENDS study.
- Evaluated continuous motion sensing recorded via an insertable cardiac monitor (ICM) in ambulatory individuals.
- Assessed device-measured activity patterns typically leveraged by pacemakers and implantable cardioverter-defibrillators for rate-adaptive pacing.
- Demonstrated continuous activity tracking using an insertable cardiac monitor in ambulatory patients lacking pacemaker or ICD indications.
- Confirmed that CIED-derived accelerometer metrics capture daily physical activity profiles across extended ambulatory monitoring periods.
Population
Ambulatory patients without pacemaker or ICD indications
Design
Sub-analysis of the LUX-Dx TRENDS study
Key expert perspectives
Captured external expert commentary on this paper, strongest first. Original sources are linked where available.
“The study seeks to use an implantable loop recorder not only to diagnose heart arrhythmias, but also to diagnose patients with heart failure and to monitor them for any heart failure exacerbation.”
Implication
May extend activity monitoring to non-CIED ambulatory patients; leaves open clinical utility and requires prospective validation.
Abstract
Accelerometer-based motion detection is a common feature of cardiovascular implanted electronic devices (CIED) such as pacemakers and defibrillators (ICDs) and has been previously used to monitor patient activity1 and inform rate adaptive pacing2. Continuous activity monitoring may also be useful for ambulatory patients who do not meet the indications for a pacemaker or ICD.
Discussion
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Cite This Study
Sauer et al. (2026) studied this question. Accelerometer-based continuous activity monitoring via insertable cardiac monitors may be useful for ambulatory patients without standard pacemaker or defibrillator indications.