Patent ID: 8041424
Filing Date: 2011-10-18
Classification: A61B,A61N

Abstract:
1. A method for use in an implantable medical device for delivering cardiac resynchronization therapy in a patient having right bundle branch block, comprising: measuring a first interval between a right atrial depolarization signal and a first heart sound signal; selecting a right atrial-ventricular (AV) pacing interval in response to the measured first interval; and delivering pacing pulses to a right ventricle of a heart at the selected right AV pacing interval; further comprising: measuring a second interval between the right atrial depolarization and a right ventricular depolarization; delivering pacing pulses to the right ventricle at a plurality of test AV pacing intervals determined based on the second interval; and assessing ventricular synchrony by determining a metric of ventricular synchrony for each of the plurality of test AV pacing intervals; wherein selecting the right AV pacing interval further comprises determining an optimal right AV pacing interval by comparing the metric of ventricular synchrony for each of the plurality of test AV pacing intervals.