Key result
Micra transcatheter pacemaker tethers risk fracture during repeated recapture maneuvers.
Why the study?
Repositioning of the Micra leadless pacemaker via tether recapture is necessary to optimize pacing threshold, but complications related to tether fracture during repeated recapture are not well described.
Case Report
Reports a complication of tether fracture during repeated recapture of a Micra leadless pacemaker.
Answers are grounded in this paper and cite their sources.
Tether fracture risk warrants caution with repeated Micra recapture; case report leaves open need for device or technique refinements.
The Micra transcatheter pacemaker system (Micra; Medtronic, Minneapolis, MN) is a leadless pacemaker recently available in several countries and an alternative to traditional transvenous pacemakers, with high safety and efficacy.1 Repositioning of the Micra is required to achieve a lower pacing threshold for the long-term longevity of the battery at the device implantation. A tether, connecting the delivery catheter to the Micra, allows the Micra repositioning. The tether is strong enough to retract the Micra by a pulling-back maneuver.
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Kusume et al. (2022) conducted a case report in Tether fracture in leadless pacemaker. Micra transcatheter pacemaker system was evaluated. The Micra transcatheter pacemaker system utilizes a tether for repositioning, which can fracture during repeated recapture maneuvers.
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