Patent ID: 7373203
Filing Date: 2008-05-13
Classification: A61N

Abstract:
1. A method including: (a) detecting cardiac events using a first sensing circuit for sensing heart signals from first and second heart chambers, wherein the first and second heart chambers are both atria, or wherein the first and second heart chambers are both ventricles; (b) obtaining intervals between cardiac events associated with the first and second heart chambers; (c) pairing successive intervals into first-second interval pairs; (d) classifying the intervals, according to their duration, into at least first and second categories; (e) recognizing patterns in the first and second intervals based on their classification, the recognizing patterns comprising counting, among a first predetermined number of most recent first-second interval pairs, a second predetermined number of one or more first-second interval pairs in which the first interval is in the first category and the second interval is in the second category; and (f) determining timing of delivery of output energy based on (e).