Leadless cardiac pacemaker with reversionary behavior

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;
• a sensing module disposed within the housing and responsive to the environment outside of the housing, the sensing module including one or more of a pressure measurement module and an acoustic measurement module, the sensing module configured to detect one or more atrial fiducials that are indicative of an atrial contraction and one or more ventricle fiducials that are indicative of a ventricle contraction;
• a control module operatively coupled to the first electrode, the second electrode, and the sensing module, the control module is configured to:
• track the one or more atrial fiducials and one or more ventricle fiducials over a plurality of cardiac cycles;
• deliver a plurality of different ventricular pacing therapies to the patient's heart via the first electrode and the second electrode, wherein the control module transitions from delivery of a first one of the different ventricular pacing therapies to a second one of the different ventricular pacing therapies based, at least in part, on one or more of the tracked atrial fiducials;
• and
• wherein the plurality of different ventricular pacing therapies comprise two or more of VDD, VDDR, VVI, VVIR, VOO and VOOR.

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;
• a sensing module for sensing a hemodynamic state of the patient;
• a control module operatively coupled to the first electrode, the second electrode, and the sensing module, the control module is configured to:
• deliver a plurality of different ventricular pacing therapies to the patient's heart via the first electrode and the second electrode, wherein the control module dynamically selects which ventricular pacing therapy to deliver based, at least in part, on the sensed hemodynamic state of the patient;
• and
• wherein the plurality of different ventricular pacing therapies comprise two or more of VDD, VDDR, VVI, VVIR, VOO and VOOR.