Micra AV2
Model MC2AVR1 | Medtronic, Inc. | Leadless pacemaker
Models with the same MRI conditions
MC2AVR1
The MRI conditions shown are based on the manufacturer's official guidelines.
Do not apply them to models not listed above; search for that model separately. Search models →
MR Conditional
Important alert
- Do not scan patients with a Micra AV2 or Micra VR2 device implanted in a location other than the right ventricle.
- Do not scan patients with abandoned leads.
- Do not scan patients with programmed outputs > 4.5 V.
- Do not scan patients who exhibit diaphragmatic stimulation when the device is pacing asynchronously during the MRI SureScan mode.
1Pre-scan checks
- Micra AV2 or Micra VR2 implanted in the right ventricle.
- No abandoned leads are present.
- A health professional who has completed radiology SureScan training must be present during the MRI scan.
- Do not scan a patient who has an active Micra AV2 or Micra VR2 device without first programming MRI SureScan to On. The active SureScan device is operating within the projected service life or the device is in a Device Off state if past the projected service life.
2MRI scan conditions
≤3T
| Field strength | Static magnetic field strength (B0): ≤3T |
|---|---|
| Scanner type | Hydrogen Proton Static magnetic field (B0) orientation: Horizontal, Cylindrical Bore / Perpendicular to Patient, AP / Perpendicular to Patient, LR |
| Spatial gradient | Maximum spatial field gradient (SFG): 25 T/m (2500 gauss/cm) |
| Gradient slew rate | Maximum gradient slew rate per axis: 200 T/m/s |
| Operating mode | RF operating mode: First Level Controlled Operating Mode or Normal Operating Mode |
| Whole-body SAR | Whole-body (averaged) specific absorption rate (SAR): ≤4 W/kg |
| Head SAR | Maximum head SAR: ≤3.2 W/kg |
| B1+rms | There is no B1+RMS limit |
| Scan region / position conditions | • Anatomy at Isocenter: Any anatomic location at isocenter is acceptable.• Patient position in scanner: Any patient position is acceptable.• Scan duration and wait time: There is no limit on scan duration for the labeled RF conditions. |
3RF COIL / RF excitation
| RF coil | • RF polarization: No restrictions on RF Polarization• RF transmit coil type: Integrated whole body transmit RF coil / Detachable head transmit/receive RF coil / Detachable extremity transmit/receive RF coil• RF receive coil: Any receive-only RF coil may be used |
|---|
4Monitoring & emergency response
- Proper patient monitoring must be provided during the MRI scan. This includes continuous monitoring of the patient’s hemodynamic function.
- Maintaining continuous visual and verbal contact with the patient.
- Continuous monitoring of the patient’s heart rate using instrumentation such as pulse oximetry (plethysmography) or electrocardiography.
- An external defibrillator must be available during the MRI scan.
- If the patient’s hemodynamic function is compromised during the MRI scan, discontinue the scan, remove the patient from the magnet room, program MRI SureScan to Off, and take the proper measures to restore the patient’s hemodynamic function.
- Monitoring is required whether the device is active, or if the device is programmed to Device Off.
5Post-scan checks
- Do not leave the device in MRI SureScan mode after the scan is complete. Be sure to program MRI SureScan to Off as soon as the scan is complete.
- The device automatically programs MRI SureScan to Off 24 hours after it is programmed to On.
6Other information
- Scanning patients who have multiple MR Conditional devices present is acceptable as long as the MR labeling conditions for all implanted devices can be satisfied.
- Do not bring the Medtronic device manager, patient connector, or base into the examination room (magnet room). They are MR Unsafe.
- Image artifact and distortion resulting from the presence of the device within the field of view must be considered when selecting the field of view and imaging parameters. These factors must also be considered when interpreting the MRI images.
- Micra AV2 and Micra VR2 devices can be safely scanned if the device is programmed to Device Off, or if the device has reached End of Service (EOS).
- Scanning patients who have multiple MR Conditional Micra devices is also acceptable when the MR labeling conditions for all Micra are satisfied.
These conditions are based on the source document shown below (revision and date). Before scanning, verify the patient's complete system (device, leads, and any other implants) against the latest manufacturer labeling.