Patent ID: 7245970
Filing Date: 2007-07-17
Classification: A61N

Abstract:
1. A cardiac rhythm management device, comprising: one or more sensing channels, each channel comprising an electrode connected to a sense amplifier for generating sense signals representing cardiac electrical activity; a plurality of pacing channels, each channel comprising an electrode adapted for disposition at a selected ventricular pacing site; a controller for controlling the delivery of pacing pulses by a selected first pacing configuration to multiple ventricular sites in accordance with a programmed atrial tracking and/or sequential atrio-ventricular pacing mode which includes a selected AV delay interval; and, wherein the controller is programmed to: perform a capture verification test at a selected time to test a selected ventricular pacing channel for presence or loss of capture during a pacing pulse, the capture verification test being performed by detecting whether an evoked response occurs during a capture detection window following the output of a pacing pulse; and, upon detection of a loss of capture in a pacing channel, re-optimize the AV delay interval for a residual second pacing configuration which does not include the pacing channel in which loss of capture was detected.