Leadless cardiac stimulation systems

摘要

Various configurations of systems that employ leadless electrodes to provide pacing therapy are provided. In one example, a system that provides multiple sites for pacing of myocardium of a heart includes wireless pacing electrodes that are implantable at sites proximate the myocardium using a percutaneous, transluminal, catheter delivery system. Each of the electrodes contains a source of electrical energy for pacing the myocardium and is adapted to receive electromagnetic energy from a source outside the myocardium. The system also includes a source adapted for placement outside the myocardium and that uses locally measured electrocardiograms to synchronize pacing of the heart by sending electromagnetic commands to the electrodes to pace the myocardium surrounding the electrodes. Also disclosed is various configurations of such systems, wireless electrode assemblies, and delivery catheters for delivering and implanting the electrode assemblies.

主权项

1. An implantable wireless electrostimulation electrode assembly, including:
a body portion sized and shaped for intravascular delivery to a location within a heart; a first spring mechanically coupled to the body portion and aligned along a longitudinal axis of the body portion, the first spring having a first rotational orientation and configured to securely engage heart tissue when rotated about the longitudinal axis in a first direction; a second spring having a second rotational orientation opposite the first rotational orientation, the second spring mechanically coupled to the body portion and configured to securely engage heart tissue to event rotation and translation of the body through heart tissue together with the first spring; and an electrostimulation circuit included with the body portion and configured to deliver an electrostimulation to the heart using an electrostimulation electrode; wherein the first and second springs are electrically isolated from the electrostimulation circuit.