Micra leadless pacemakers are the world’s smallest pacemakers1 for bradyarrhythmia management.
Micra™ AV2 and Micra™ VR2 leadless pacemakers
Leadless pacing just got smarter.
Micra AV2 and Micra VR2 provide an unmatched leadless pacing experience for bradycardia patients. With improved battery longevity and smarter algorithms, most patients will only need one device for life.1
Micra AV2 automatically customizes AV synchrony settings for each patient, reducing the need for manual programming by more than 50% compared to Micra AV.1 The smarter algorithms also improve automatic AV synchrony at faster heart rates between 80–100 bpm,1 and the upper tracking rate limit is now 135 bpm.
The updated delivery system now has a rounded catheter tip with more surface area to decrease tip pressure during device implant.2 Micra AV2 and Micra VR2 devices are implanted with the same streamlined procedure that has been utilized by nearly 10,000 trained Micra physicians worldwide.3
The 105 cm long delivery system has a handle that controls deflection and deployment of the Micra pacing capsule. There are five key components:
- Device deployment button
- Curve deflection button
- Tether lock button
- Tether pin
- Flush port
Introducer sheath
The Micra introducer sheath enables smooth vessel navigation with a lubricious hydrophilic coating and silicone oil-coated dilator tip. It has a 23 Fr inner diameter and 27 Fr outer diameter. There are three key components:
- Extended distal taper
- 56 cm (22 in) working length
- Side port with three-way stopcock
Micra AV is an effective therapy for patients with AV block.4Chinitz, et al. Heart Rhythm. 2023.
The first prospective multicenter study of Micra AV concludes that it significantly improves quality of life in patients with AV block and normal sinus function. AV synchrony remained stable through three months and there were no system upgrades to dual-chamber systems.
- Sustained resting AV synchrony at 85.4% and stable through 3-months follow-up
- Improved ambulatory AV synchrony at 82.6% with optimized programming
- No upgrades through three months with no major complications due to pacemaker syndrome
Shorter-term advantages associated with leadless pacing persist and continue to accrue in the medium-to-long-term.5
Crossley, et al. J Cardiovasc Electrophysiol. 2023.
Patients treated with Micra VR experience significantly fewer complications, reinterventions, infections, and heart failure hospitalizations through three-years compared to patients receiving a traditional transvenous pacemaker.
Micra VR patients through three years compared to TV-VVI patients:
- 32% lower rate of chronic complications
- 41% lower rate of reinterventions
- 10% lower rate of heart failure hospitalizations
- 35% fewer upgrades to CRT devices
Model specifications
| Parameter |
Micra AV2 |
Micra VR2 |
|---|---|---|
| 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 |
15.6 years1 |
16.7 years1 |
| Accelerometer-based mechanical atrial sensing |
Yes |
N/A |
| Accelerometer-based rate response |
Yes |
Yes |
| MRI SureScan™ |
≤ 3T |
≤ 3T |
| CareLink™ remote monitoring |
Yes |
Yes |
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References
1
Sheldon T, Escalante K, Fagan D. Device Longevity and AV Synchrony Algorithm Modeling of a Leadless Pacemaker Family: A Virtual Patient Analysis. January 2023. Medtronic data on file.
2
Mattson AR, Raghupathy R. Reducing Cardiac Perforation in Leadless Pacing: An Update to the Micra Leadless Pacemaker Delivery System. January 2023. Medtronic data on file.
3
Susumu A. 10,000 Micra trained physicians. February 2023. Medtronic data on file.
4
Chinitz LA, El-Chami MF, Sagi V, et al. Ambulatory atrioventricular synchronous pacing over time using a leadless ventricular pacemaker: Primary results from the AccelAV study. Heart Rhythm. January 2023;20(1):46–54.
5
Crossley GH, Piccini JP, Longacre C, et al. Leadless versus transvenous single-chamber ventricular pacemakers: 3 year follow-up of the Micra CED study. J Cardiovasc Electrophysiol. April 2023;34(4):1015–1023.