Leadless Cardiac Pacemaker with Secondary Fixation Capability

摘要

The invention relates to leadless cardiac pacemakers (LBS), and elements and methods by which they affix to the heart. The invention relates particularly to a secondary fixation of leadless pacemakers which also include a primary fixation. Secondary fixation elements for LBS's may passively engage structures within the heart. Some passive secondary fixation elements entangle or engage within intraventricular structure such as trabeculae carneae. Other passive secondary fixation elements may engage or snag heart structures at sites upstream from the chamber where the LBS is primarily affixed. Still other embodiments of passive secondary fixation elements may include expandable structures.

主权项

1. A leadless biostimulator comprising:
a housing sized and configured to be disposed within a heart chamber of a human; a primary fixation element configured to affix the biostimulator to a heart wall within the heart chamber; and an expandable structure connected to a proximal portion of the housing, the expandable structure being adapted to assume a compressed linear configuration during delivery and an expanded configuration after delivery to confine the leadless biostimulator to the heart chamber.