METHODS AND SYSTEMS FOR DETECTING ATRIAL CONTRACTION TIMING FIDUCIALS DURING VENTRICULAR FILLING FROM A VENTRICULARLY IMPLANTED LEADLESS CARDIAC PACEMAKER

摘要

A ventricularly implantable medical device that includes a sensing module that is configured to detect an artifact during ventricular filling and to identify an atrial event based at least on part on the detected artifact. Control circuitry of the implantable medical device is configured to deliver a ventricular pacing therapy to a patient's heart, wherein the ventricular pacing therapy is time dependent, at least in part, on the identified atrial event.