Patent ID: 9089711
Filing Date: 2015-07-28
Classification: A61N,G06K

Abstract:
1. A processor-based method for use with an active implantable medical device for cardiac pacing, resynchronization and/or defibrillation, comprising: forming a plurality of first reference endocardial acceleration vectors using a plurality of endocardial acceleration signals acquired using stimulation to cause capture; forming a plurality of second reference endocardial acceleration vectors using a plurality of endocardial acceleration signals acquired in a spontaneous rhythm of the patient in the absence of ventricular pacing; creating at least a two dimensional space using the first reference endocardial acceleration vectors and the second reference endocardial acceleration vectors, wherein the at least two dimensional space comprises two subspaces corresponding to the presence and absence of capture, respectively; and testing for ventricular capture after acquiring a new endocardial acceleration signal, wherein the testing comprises forming a new endocardial acceleration vector for the new endocardial acceleration signal, and wherein the testing comprises determining the presence or absence of capture for the new endocardial acceleration signal based on the position of the new endocardial acceleration vector relative to the two subspaces of the at least two dimensional space.