CPC A61N 1/368 (2013.01) [A61N 1/3621 (2013.01); A61N 1/36507 (2013.01); A61N 1/36514 (2013.01); A61N 1/36535 (2013.01); A61N 1/36564 (2013.01); A61N 1/36578 (2013.01); A61N 1/36585 (2013.01); A61N 1/3756 (2013.01); A61N 1/3787 (2013.01); A61N 1/37223 (2013.01); A61N 1/37288 (2013.01); A61N 1/3956 (2013.01)] | 15 Claims |
1. A leadless cardiac pacemaker (LCP) configured to sense cardiac activity and to deliver pacing therapy to 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;
sensing electronics disposed within the housing and responsive to the environment outside of the housing, the sensing electronics configured to detect two or more different atrial artifacts that are each indicative of a particular atrial contraction;
control electronics operatively coupled to the first electrode, the second electrode, and the sensing electronics, the control electronics configured to:
identify an atrial timing fiducial for each of a plurality of cardiac cycles, wherein the atrial timing fiducial for each of the plurality of cardiac cycles is based on the two or more atrial artifacts sensed during the corresponding cardiac cycle, wherein the two or more different atrial artifacts comprise two or more of a S2 heart sound, a S4 heart sound, and an A-wave;
track the atrial timing fiducials identified for each of the plurality of cardiac cycles over time;
identify a relationship between one or more of the tracked atrial timing fiducials identified for each of the plurality of cardiac cycles and another detected cardiac event or an anticipated but missing cardiac event; and
deliver a plurality of different types of ventricular pacing therapies to the patient's heart via the first electrode and the second electrode, wherein the control electronics select which type of ventricular pacing therapy to deliver based, at least in part, on the identified relationship.
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