Key result
A transcatheter pacing system implanted in a sheep for 28 months was successfully retrieved in vivo without complications using a custom sheath and market-released tools.
Case Report (n=1)
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Supports long-term retrieval feasibility in preclinical models; leaves open human translation pending clinical data.
The Medtronic Micra transcatheter pacing system (TPS) is a miniaturized VVIR pacemaker that is less than one-tenth the volume of a typical pacemaker, or 0.8 cc (6.7 mm diameter by 26 mm long). The TPS is small enough to place directly within the right ventricle (RV) at the site of pacing, and uses 4 nitinol tines for fixation. Implanting the pacemaker entirely within the heart eliminates the need for both a device pocket and a lead. The pocket and lead contributed to 75% and 88% of the complications in 2 different reports.
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Bongiorni et al. (2015) conducted a case report in Transcatheter pacemaker retrieval (n=1). Transcatheter pacemaker retrieval using a custom sheath and market-released tools was evaluated on Successful retrieval of the device. A transcatheter pacing system implanted in a sheep for 28 months was successfully retrieved in vivo without complications using a custom sheath and market-released tools.
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