Patent ID: 6654639
Filing Date: 2003-11-25
Classification: A61N

Abstract:
An implantable cardiac stimulation device configured for controlling a plurality of chambers of a patient's heart through a plurality of electrodes adapted to be implanted in a respective chamber of the heart, the stimulation device comprising:pulse generating circuitry, coupled to the plurality of electrodes, configured to independently generate stimulation pulses to stimulate an associated heart chamber; sensing circuitry, coupled to the plurality electrodes, configured to independently receive intrinsic cardiac signals from an associated heart chamber; wherein the sensing circuit detects an intrinsic activation sequence and associated interchamber time delays; a controller, coupled to the pulse generating circuitry and the sensing circuitry, configured to control the stimulation of each respective heart chamber, to detect the presence of tachycardia from the received intrinsic signals, and to determine which one of the chambers originated the tachycardia; and wherein, in response to detecting tachycardia, the controller controls a sequence of stimulation pulses according to a predetermined anti-tachycardia pacing cycle length to the controlled chambers relative to the intrinsic chamber activation sequence and the associated interchamber time delays.