Patent ID: 8634912
Filing Date: 2014-01-21
Classification: A61N

Abstract:
1. A leadless intra-cardiac medical device (LIMD), comprising: a housing configured to be implanted entirely within a single local chamber of the heart; a base on the housing, the base configured to be secured to the local chamber; a first electrode provided on the housing at a first position such that, when the housing is implanted in the local chamber, the first electrode is configured to engage wall tissue at a local activation site within a conduction network of the local chamber; an intra-cardiac extension having a proximal end, a distal end and an extension body extending there between, the proximal end coupled to the housing and located in the local chamber, the extension body including a stabilization arm provided at the distal end thereof, the extension body being sufficient in length to extend from the local chamber into an adjacent chamber, the extension body including an active interim-segment located at an intermediate point along the extension body; wherein the stabilization arm includes a stabilizer end-segment located at the distal end and extending in a first lateral direction to engage a first region of the heart, the active interim-segment extending in a second lateral direction to engage a second region of wall tissue of the adjacent chamber; a second electrode provided on the active interim-segment of the extension body, the second electrode configured to engage wall tissue at a distal activation site within a conduction network of the adjacent chamber; and a controller, within the housing, configured to cause stimulus pulses to be delivered, in a dual chamber synchronous manner, through the first and second electrodes to the local and distal activation sites, respectively.