LCP based predictive timing for cardiac resynchronization
AssigneeCardiac Pacemakers, Inc.
InventorJeffrey E. Stahmann
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Abstract
Methods, systems and devices for providing cardiac resynchronization therapy (CRT) to a patient using a leadless cardiac pacemaker (LCP) implanted in or proximate the left ventricle of a patient. A setup phase is used to establish parameters in the therapy delivery. In operation, the method and/or device will sense at least one non-paced cardiac cycle to determine a native R-R interval, and then delivers a synchronization pace at an interval less than the native R-R interval followed by a plurality of pace therapies delivered at the R-R interval or a modification thereof.
Claims11
A leadless cardiac pacemaker (LCP) configured for implantation entirely within a heart chamber of a patient or adjacent to a heart chamber of a patient, the LCP comprising:
- a plurality of electrodes for cardiac therapy delivery and cardiac electrical sensing;
- pacing circuitry configured to generate pacing therapy outputs;
- and
- control circuitry configured to analyze signals from the electrodes and to control the use of the pacing circuitry for cardiac resynchronization therapy (CRT);
- wherein the control circuitry is configured for:
- sensing a native R-R interval from the patient's heart;
- calculating a synchronization interval by reducing the native R-R interval using a reduction factor;
- sensing a native ventricular event;
- delivering a synchronization pace therapy upon expiration of the synchronization interval following the native ventricular event;
- and
- delivering a predetermined number, N, of additional pace therapies at intervals approximately equal to the native R-R interval.
Dependencies are inferred from the claim text.