Patent ID: 8611999
Filing Date: 2013-12-17
Classification: A61N

Abstract:
1. A cardiac pacing device, comprising: pulse generation circuitry for generating pacing pulses; sensing circuitry for sensing cardiac electrical activity; a controller for detecting cardiac events that define pacing timing intervals and for controlling the delivery of pacing pulses in accordance with a programmed mode; a switch matrix operable by the controller for connecting the pulse generation circuitry and sensing circuitry to selected electrodes in order to form selected sensing and pacing channels; wherein the controller is programmed to: sense cardiac activity through a right ventricular sensing channel; schedule delivery of paces through left ventricular pacing channels to at least two left ventricular sites designated LV define selected refractory periods such that when a sensing channel is refractory either the sensing channel is disabled or sensed activity is ignored for purposes of cardiac event detection; initiate a post-pace refractory period for the right ventricular sensing channel when the first ventricular pace is delivered during a cardiac cycle; and, after initiation of the post-pace refractory periods for the right ventricular sensing channel when a first ventricular pace is delivered to site LV