Micra AV and Micra VR leadless pacemakers for bradyarrhythmia management
The Micra™ AV and Micra™ VR leadless pacemakers are implantable, programmable cardiac devices used to monitor and regulate a patient’s heart rate.
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Overview
Model specifications
| Parameter |
Micra AV2 |
Micra VR3 |
|---|---|---|
| Pacing mode |
VVI, VVIR, VOO, OVO, VDD, VDI, ODO, OFF |
VVI, VVIR, VOO, OVO, OFF |
| Mass |
1.75 g |
1.75 g |
| Volume |
0.8 cc |
0.8 cc |
| Electrode spacing |
18 mm |
18 mm |
| Battery longevity |
8–13 years†2,4 |
12 years‡5 |
| Accelerometer-based mechanical atrial sensing |
Yes |
N/A |
| Accelerometer-based rate response |
Yes |
Yes |
| MRI SureScan™ |
1.5T & 3T |
1.5T & 3T |
| CareLink™ remote monitoring |
Yes |
Yes |
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*
The single chamber Micra™ transcatheter pacing system is being described herein as Micra™ VR in order to distinguish it from the dual chamber (VDD) Micra™ AV product. When information in this document relates to both Micra AV and VR, “Micra™ transcatheter pacing systems” is used to represent the portfolio of devices.
†
Use conditions include:
8 years = 100% VDD pacing, 60 bpm, pacing threshold 1.5 V, impedance 500 Ω, pulse width 0.24 ms.
13 years = 15% VDD pacing, 70 bpm, pacing threshold 1.5 V, impedance 600 Ω, pulse width 0.24 ms.
‡
Use conditions included: median pacing 53.5%, median pacing threshold 0.50 V, median impedance 543 Ω; 89% of patients with > 10-year projected longevity; 99% of patients with > 5-year longevity.5
References
1
Nippoldt D, Whiting J. Micra Transcatheter Pacing System Device Volume Characterization Comparison. November 2014. Medtronic data on file.
2
Medtronic Micra™ AV MC1AVR1 Device Manual. January 2020.
3
Medtronic Micra™ MC1VR01 Clinician Manual. October 2016.
4
Pender J, Whiting J. Micra AV Battery Longevity. January 2020. Medtronic data on file.
5
Duray GZ, Ritter P, El-Chami M, et al. Long-term performance of a transcatheter pacing system: 12-Month Results from the Micra Transcatheter Pacing Study. Heart Rhythm. May 2017;14(5):702–709.