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Leadless Micra pacemakers: Estimating long-term longevity. A real word data analysis.
Domenico Maria Carretta1, Luca Tomasi2, Claudio Tondo3
1Azienda Ospedaliera, Policlinico, Bari, Italy.
International Journal of Cardiology
|February 14, 2025
Summary
Leadless pacemakers show a median lifespan of 14-17 years in real-world use. Lower stimulation thresholds at implantation predict longer battery longevity for these devices.
Area of Science:
- Cardiology
- Biomedical Engineering
- Medical Devices
Background:
- Leadless pacemakers offer proven safety and efficacy.
- Limited real-world data exists on leadless pacemaker lifespan.
Purpose of the Study:
- To estimate the real-world clinical lifespan of leadless pacemakers.
- To identify predictors of leadless pacemaker longevity.
Main Methods:
- Prospective observational study of 391 patients with Micra leadless pacemakers.
- Systematic remote monitoring and data collection over a median of 33.9 months.
- Calculation of virtual battery longevity (VBL) to estimate total device lifespan.
Main Results:
- One patient experienced battery depletion during follow-up.
- Median VBL at baseline was 172 months (14.3 years).
- Capture threshold >1V @ 0.24 ms was the strongest predictor of VBL depletion within 8 years.
Conclusions:
- Leadless pacemakers demonstrate a median expected longevity of 14-17 years in clinical practice.
- Stimulation thresholds ≤1V @ 0.24 ms predict increased device longevity.
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