Patent ID: 6128529
Filing Date: 2000-10-03
Classification: A61N

Abstract:
A method of cardiac rhythm management, comprising the steps of:restricting ventricular and atrial pacing therapy to a variable ventricular-atrial (VA) time interval therapy, when an electrical countershock therapy is enabled, the VA time interval therapy comprising the steps of:(a) initiating an atrial-ventricular (AV) time interval upon an atrial event;(b) sensing heart activity including a ventricular activation during the AV time interval;(c) determining a time remaining in the AV time interval subsequent to the ventricular activation sensed during the AV time interval; and(d) lengthening a ventricular-atrial (VA) time interval by the time remaining in the AV time interval as determined in step (c);determining if the sensed heart activity indicates a need for delivering an electrical countershock; anddelivering the electrical countershock, if needed.