Patent ID: 7869878
Filing Date: 2011-01-11
Classification: A61N

Abstract:
1. An implantable cardiac stimulation device that generates an intracardiac electrogram having reduced respiratory modulation effect, comprising: a pulse generator that provides pacing pulses to a heart; a sensing circuit that senses cardiac activity evoked by pacing pulses provided in accordance with temporary pacing parameters and provides an intracardiac electrogram (IEGM) signal extending over a plurality of cardiac cycles, wherein the IEGM signal corresponds to the cardiac activity evoked by the pacing pulses; an integrator configured to receive the IEGM signal from the sensing circuit and to determine the integral under each cardiac cycle in the IEGM signal; a respiration monitor configured to monitor the determined integrals and determine when one or more complete respiratory cycles have occurred based on the determined integrals; a cardiac cycle selector configured to select a set of IEGM cardiac cycles from the IEGM signal that occurred during the time of the one or more complete respiratory cycles determined by the respiration monitor; a processing circuit configured to process the selected set of IEGM cardiac cycles to provide the IEGM having reduced respiratory modulation effect; and a controller that controls the pulse generator to provide pacing pulses in accordance with the temporary pacing parameters, and once it is determined that one or more complete respiratory cycles has occurred, to provide pacing pulses in accordance with permanent pacing parameters.