Patent ID: 7412287
Filing Date: 2008-08-12
Classification: A61N

Abstract:
1. A method for verifying capture by a cardiac pacemaker, comprising: delivering biventricular pacing during a paced cardiac cycle; recording an evoked response electrogram during a paced cardiac cycle; comparing the waveform of the evoked response electrogram with template waveforms representing biventricular, left ventricle-only, and right ventricle-only capture; determining that either biventricular, left ventricle-only, or right ventricle-only capture has occurred during the paced cardiac cycle if the degree of similarity between the evoked response and one of the biventricular, left ventricle-only, or right ventricle-only capture template waveforms is above a specified threshold; and, selecting an optimum sensing vector for generating the evoked response and template waveforms by generating biventricular, left ventricle-only, and right ventricle-only capture templates using a plurality of different sensing vectors and selecting the optimum sensing vector as that sensing vector for which the biventricular capture template is least similar to one or both of the left ventricle-only and right ventricle-only capture templates.