Techniques for successful early retrieval of the Micra transcatheter pacing system: A worldwide experience

Muhammad R. Afzal, Emile G. Daoud, Ryan Cunnane, Shiva K. Mulpuru, Alan Koay, Azlan Hussain, Razali Omar, Koh Kok Wei, Anish Amin, Gregory Kidwell, Nirav Patel, Charles Love, Michael Lloyd, Maciej Sterliński, Seth Goldbarg, Miguel A. Leal, James Gabriels, Apoor Patel, Ram Jadonath, Eric GrubmanGeorge Crossley, Chris Pepper, Dhanunjaya Lakkireddy, Toshimasa Okabe, John D. Hummel, Ralph S. Augostini

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Background: Experience with retrieval of the Micra transcatheter pacing system (TPS) is limited because of its relatively newer technology. Although abandonment of the TPS at end of life is recommended, certain situations such as endovascular infection or device embolization warrant retrieval. Objective: The purpose of this study was to report the worldwide experience with successful retrieval of the Micra TPS. Methods: A list of all successful retrievals of the currently available leadless pacemakers (LPs) was obtained from the manufacturer of Micra TPS. Pertinent details of retrieval, such as indication, days postimplantation, equipment used, complications, and postretrieval management, were obtained from the database collected by the manufacturer. Other procedural details were obtained directly from the operators at each participating site. Results: Data from the manufacturer consisted of 40 successful retrievals of the Micra TPS. Operators for 29 retrievals (73%) provided the consent and procedural details. Of the 29 retrievals, 11 patients underwent retrieval during the initial procedure (immediate retrieval); the other 18 patients underwent retrieval during a separate procedure (delayed retrieval). Median duration before delayed retrieval was 46 days (range 1–95 days). The most common reason for immediate retrieval was elevated pacing threshold after tether removal. The most common reasons for delayed retrieval included elevated pacing threshold at follow-up, endovascular infection, and need for transvenous device. Mean procedure duration was 63.11 ± 56 minutes. All retrievals involved snaring via a Micra TPS delivery catheter or steerable sheath. No serious complications occurred during the reported retrievals. Conclusion: Early retrieval of the Micra TPS is feasible and safe.

Original languageEnglish (US)
Pages (from-to)841-846
Number of pages6
JournalHeart rhythm
Issue number6
StatePublished - Jun 2018


  • Cardiac implantable electronic device
  • Elevated threshold
  • Leadless pacemaker
  • Micra transcatheter pacing system
  • Retrieval

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)


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