US 11,052,258 B2
Methods and systems for detecting atrial contraction timing fiducials within a search window from a ventricularly implanted leadless cardiac pacemaker
Keith R. Maile, New Brighton, MN (US); Jeffrey E. Stahmann, Ramsey, MN (US); Michael J. Kane, St. Paul, MN (US); Benjamin J. Haasl, Forest Lake, MN (US); Krzysztof Z. Siejko, Maple Grove, MN (US); Allan Charles Shuros, St. Paul, MN (US); William J. Linder, Golden Valley, MN (US); and Brendan Early Koop, Ham Lake, MN (US)
Assigned to CARDIAC PACEMAKERS, INC., St. Paul, MN (US)
Filed by CARDIAC PACEMAKERS, INC., St. Paul, MN (US)
Filed on Nov. 29, 2018, as Appl. No. 16/204,982.
Claims priority of provisional application 62/593,703, filed on Dec. 1, 2017.
Prior Publication US 2019/0168008 A1, Jun. 6, 2019
Int. Cl. A61N 1/375 (2006.01); A61N 1/39 (2006.01); A61N 1/36 (2006.01); A61N 1/365 (2006.01); A61N 1/37 (2006.01); A61B 5/00 (2006.01); A61N 1/368 (2006.01); A61N 1/372 (2006.01)
CPC A61N 1/37512 (2017.08) [A61N 1/36167 (2013.01); A61N 1/36507 (2013.01); A61N 1/36542 (2013.01); A61N 1/36564 (2013.01); A61N 1/36578 (2013.01); A61N 1/3706 (2013.01); A61N 1/3756 (2013.01); A61N 1/39622 (2017.08); A61B 5/686 (2013.01); A61N 1/3682 (2013.01); A61N 1/36585 (2013.01); A61N 1/37252 (2013.01); A61N 1/3925 (2013.01); A61N 1/3968 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A leadless cardiac pacemaker (LCP) configured to sense cardiac activity and to deliver pacing therapy to a ventricle of a patient's heart, the LCP comprising:
a housing;
a first electrode secured relative to the housing and exposed to the environment outside of the housing;
a second electrode secured relative to the housing and exposed to the environment outside of the housing;
a sensing module secured relative to the housing and responsive to the environment outside of the housing, the sensing module including a pressure measurement module and an electrogram measurement module;
a control module operatively coupled to the first electrode, the second electrode, and the sensing module, the control module is configured to:
identify a window of time during each of one or more cardiac cycles, wherein the window of time has a duration that is less than an entire cardiac cycle;
process information gathered during the window of time by the pressure measurement module and the electrogram measurement module to identify an atrial event of the patient's heart during a cardiac cycle, wherein a p-wave signal detecting an atrial activation by the electrogram measurement module is given a higher priority than a pressure signal detecting an atrial kick by the pressure measurement module; and
deliver a ventricular pacing pulse to the patient's heart via the first electrode and the second electrode, wherein the ventricular pacing pulse is delivered at a time that is based, at least in part, on the identified atrial event.