Patent ID: 8521268
Filing Date: 2013-08-27
Classification: A61B,A61N

Abstract:
1. A method comprising: storing an electrogram (EGM) template in a memory, the EGM template including first and second alignment points at first and second peaks of the EGM template, respectively; identifying first and second peaks of a cardiac cycle EGM acquired by a medical device; selecting one of the first and second peaks of the cardiac cycle EGM to align with one of the first and second alignment points based on an order in which the first and second peaks of the cardiac cycle EGM occur; aligning the selected one of the first and second peaks with one of the first and second alignment points; and determining an amount of similarity between the cardiac cycle EGM and the EGM template after alignment; performing a second-order difference operation on the cardiac cycle EGM and the EGM template before identifying the first and second peaks of the cardiac cycle EGM and selecting one of the first and second peaks of the cardiac cycle EGM.