Healthcare Professionals


Transcatheter Pacing System

Micra Transcatheter Pacing System

Meet Micra

Micra™ Transcatheter Pacing System (TPS) is the world’s smallest pacemaker,1 delivered percutaneously via a minimally invasive approach, directly into the right ventricle without the use of leads.

  • Miniaturized, 93% smaller than conventional pacemakers2
  • Designed to eliminate pocket- and lead-related complications3
  • FDA approved for 1.5T or 3T MRI scans4
  • Resulted in 99.2% implant success rate, 0 dislodgements, 0 systemic infections in 725-patient global trial4
  • Reduced complications by 51% versus traditional pacemakers4
  • New ultra low-power circuit design delivers an estimated average 12-year battery longevity4

Micra Implant Procedure

The Micra Transcatheter Pacing System includes three elements:

Micra Pacing Capsule with FlexFix™ Nitinol Tines

  • Provides atraumatic and secure device placement
  • Two tines have 15 times the holding force necessary to hold the device in place5
  • Designed to minimize tissue trauma during deployment, repositioning, and retrieval6
  • Optimal electrode tissue interface allows for low and stable chronic thresholds7

Micra Pacing Capsule with FlexFix™ Nitinol Tines

Micra Delivery Catheter

  • 105-cm-long catheter system with a handle that controls deflection and deployment of the Micra pacing capsule

Micra Delivery Catheter

Micra Introducer 

  • Lubricious hydrophilic coating facilitates smooth vessel entry 
  • 23 Fr inner diameter (27 Fr outer diameter)
  • Silicone-oil-coated dilator tip

Micra Introducer



Delivery catheter provides visual feedback when adequate tip pressure has been achieved and retracts during deployment.8



Linear one-step deployment facilitates consistent capsule placement, no torque required.8


Device Life Cycle Management Options

  • Micra can be turned OFF and an additional Micra can be added. (Micra takes up <1% of the volume of a normal right ventricle.), or
  • Micra can be turned OFF and a traditional system or upgrade can be implanted.
  • The Micra design incorporates a proximal retrieval feature to enable acute retrieval. 



Nippoldt, Doug; Whiting, Jon. Micra Transcatheter Pacing System: Device Volume Characterization Comparison. November 2014. Medtronic Data on File.


Williams, Eric, Whiting Jon; Micra Transcatheter Pacing System Size Comparison, November 2014, Medtronic Data on File.


Udo EO, Zuithoff NP, van Hemel NM, et al. Incidence and predictors of short- and long-term complications in pacemaker therapy: the FOLLOWPACE study. Heart Rhythm. May 2012;9(5):728-735.


Reynolds DW, Duray GZ, Omar R, et al. A Leadless Intracardiac Transcatheter Pacing System. N Engl J Med. Published online November 9, 2015.


Eggen M, Grubac V, Bonner M. Design and Evaluation of a Novel Fixation Mechanism for a Transcatheter Pacemaker. IEEE Trans Biomed Eng. September 2015;62(9):2316-2323.


Eggen, Mike. FlexFix Tine Design. April 2015. Medtronic Data on File.


Bonner M, Eggen M, Haddad T, Sheldon T, Williams E. Early Performance and Safety of the Micra Transcatheter Pacemaker in Pigs. Pacing Clin Electrophysiol. November 2015;38(11):1248-1259.


Medtronic Micra Implant Manual, April, 2015


For listing of Indications, Contraindications, Warnings, Precautions, and Potential Adverse Events, please refer to the Instructions For Use .