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Worldwide Chronic Retrieval Experience of Helix-Fixation Leadless Cardiac Pacemakers

P. Neuzil, DV. Exner, RE. Knops, DJ. Cantillon, P. Defaye, R. Banker, P. Friedman, C. Hubbard, SM. Delgado, A. Bulusu, VY. Reddy

. 2025 ; 85 (11) : 1111-1120. [pub] 20250108

Language English Country United States

Document type Journal Article, Multicenter Study

BACKGROUND: The growing use of leadless pacemaker (LP) technology requires safe and effective solutions for retrieving and removing these devices over the long term. OBJECTIVES: This study sought to evaluate retrieval and removal of an active helix-fixation LP studied in worldwide regulatory clinical trials. METHODS: Subjects enrolled in the LEADLESS II phase 1 investigational device exemption, LEADLESS Observational, or LEADLESS Japan trials with an attempted LP retrieval at least 6 weeks postimplantation were included. The retrieval success rate was evaluated for all attempted retrievals. Site-reported complications associated with LP retrievals were quantified, with the severity and relationship adjudicated by an independent clinical events committee. RESULTS: There were 1,423 successful LP implants and 234 chronic LP retrieval attempts in 233 subjects. The overall retrieval success rate was 87.6% (205 of 234 attempts). The most common reason for failed retrieval (86.2%, 25 of 29 attempts) was inability to access the LP docking button. The mean time from implantation to attempted retrieval was 3.2 years (range 0.2-9.0 years) and did not significantly influence the retrieval success (P = 0.71). The clinical events committee adjudicated 11 complications in 9 subjects as being retrieval related (3.9%, 9 of 233 subjects). CONCLUSIONS: The safety and efficacy of chronic LP retrieval of an active helix-fixation device was demonstrated in an international clinical trial setting, with implant durations up to 9 years.

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$a Exner, Derek V $u University of Calgary, Calgary, Alberta, Canada
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