Patent ID: 7729754

Claim:
A method of determining PR dissociation comprising: sensing atrial events (P-waves) and ventricular events (R-waves); generating a target PR value from a plurality of preceding R-R intervals; identifying a given R-R interval; setting a current PR interval for the given R-R interval to a first duration defined as the interval between a final atrial event and a final ventricular event of the given R-R interval if the first duration exceeds a consideration value and setting the current PR interval to a second duration if the first duration is equal to or less than the consideration value, wherein the second duration is equal to the first duration plus a PP interval defined as the interval between a penultimate atrial event in the given R-R interval and the final atrial event; comparing the current PR interval to the target PR value; determining if the current PR interval is dissociated based upon the comparison; and delivering therapy to a patient based upon the determination of dissociation.