Patent ID: 8532774
Filing Date: 2013-09-10
Classification: A61B,A61N

Abstract:
1. A method for detecting PNS using an implantable medical device connectable to a plurality of electrodes electrically coupled to a heart of a patient in at least one electrode configuration, comprising: delivering pacing pulses having a predetermined pulse amplitude and/or width within the refractory period of the left ventricle using at least one electrode configuration, wherein said pacing pulses are repeatedly delivered during a number of cardiac cycles and wherein said pacing pulses are delivered at different predetermined delays relative to an onset of the refractory period of the left ventricle in different cardiac cycles; measuring impedance signals in time windows synchronized with said delivery of pacing pulses in said refractory period of the left ventricle using at least one electrode configuration; gathering at least one impedance signal from each time window; creating aggregated impedance signals using the impedance signals from the different time windows; and analyzing the aggregated impedance signals to detect PNS.