The fixation tines of the Micra™ leadless pacemaker are atraumatic to the tricuspid valve.
Alexander R MattsonJorge D Zhingre SanchezPaul Anthony IaizzoPublished in: Pacing and clinical electrophysiology : PACE (2018)
The forces required to rupture tricuspid chordae tendineae significantly exceeded the forces potentially imposed on the chordae during Micra™ device retrievals. We conclude that the fixation tines of the Micra™ device are unlikely to damage the tricuspid apparatus during either implant or retrieval.