Patent ID: 7233824
Filing Date: 2007-06-19
Classification: A61N

Abstract:
1. A method for managing an extra-systolic stimulation cardiac pacing therapy on a beat-by-beat basis, comprising: sensing electrical activity of a heart on a beat-by-beat basis to provide output signals related to at least one of: a sensed atrial depolarization, a first atrial pacing event, a second atrial pacing event, a sensed right ventricular depolarization, a first right ventricular pacing event, a second right ventricular pacing event, a sensed left ventricular depolarization, a first left ventricular pacing event, a second left ventricular pacing event; determining if the output signals indicate an occurrence of at least one unscheduled depolarization in a single cardiac chamber; and if at least one unscheduled depolarization occurred, then deciding between a mode of ceasing delivery and delivering an extra-systolic stimulation therapy to at least one chamber of the heart, wherein the ceasing step further comprises one of: withholding delivery and not initiating delivery of the extra-systolic stimulation therapy in the event that the unscheduled cardiac activity begins an accumulating tachycardia evidence counter of an on-going tachycardia episode or until such time as either the evidence counter reaches a preset threshold and a tachycardia episode is declared or the evidence counter is reset to a nominal or null value.