Patent ID: 7894897
Filing Date: 2011-02-22
Classification: A61N

Abstract:
1. An implantable cardiac stimulation device comprising: a sensing circuit adapted to sensed intrinsic cardiac electrical signals and evoked response cardiac electrical signals; a pulse generator adapted to provide first and second pacing pulses to a chamber of a heart, the first pacing pulses having a normal operating output level and the second pacing pulses having an output level greater than the normal operating output level; a fusion beat predicting circuit operative to predict when delivery of a first pacing pulse to the chamber will likely produce a fusion beat, the prediction based on intrinsic cardiac electrical signals sensed during a time period prior to when the pulse generator will deliver the first pacing pulse; and a fusion beat control that causes the pulse generator to provide the second pacing pulse to the chamber in place of the first pacing pulse, in response to the fusion beat predicting circuit predicting that delivery of a first pacing pulse to the chamber will likely produce a fusion beat.