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Updated: Jan 29, 2026

Translational Rabbit Model of Chronic Cardiac Pacing
Published on: January 6, 2023
First-in-human retrieval of chronically implanted Micra transcatheter pacing system
Antonio Curnis1, Manuel Cerini1, Davide Mariggiò2
1Chair and Unit of Cardiology, University of Brescia, Spedali Civili Hospital, Brescia, Italy.
Abstract:
We report the first-in-human retrieval of a chronically implanted Micra transcatheter pacing system (TPS; Medtronic, Minneapolis, MN, USA). A 41-year-old woman suffering from third-degree atrioventricular block was successfully implanted with a TPS in the low septum of the right ventricle. After 29 months, due to an increased electrical threshold and 100% pacing percentage, the device showed low battery voltage. Despite the long implant duration, the attempt of device retrieval using a snare loop inserted in the delivery system of a TPS was successful. In the same procedure, a new leadless pacemaker was implanted in the high right ventricular septum with optimal pacing threshold.
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