Patent ID: 8306620
Filing Date: 2012-11-06
Classification: A61N

Abstract:
1. A cardiac medical device for delivering anti-tachycardia pacing, comprising: a plurality of electrodes implantable within a patient for sensing cardiac signals and delivering cardiac pacing pulses; a therapy delivery module coupled to the plurality of electrodes for delivering pacing pulses to the patient's heart via the plurality of electrodes; and a controller coupled to the therapy delivery module and adapted to be electrically connected to the plurality of electrodes, the controller configured to: detect a tachycardia episode from the cardiac signals, schedule one single-chamber pacing pulse in response to detecting the tachycardia episode, control the therapy delivery module to deliver, via the plurality of electrodes, the one single-chamber pacing pulse followed by a plurality of dual chamber pacing pulses, the one single-chamber pacing pulse delivered in an atrial chamber at a paced ventricular-atrial interval following a ventricular sense event and a first one of the plurality of dual chamber pacing pulses delivered at a pacing cycle length following the ventricular sense event, the one single-chamber pacing pulse delivered at a prematurity interval earlier than the first one of the plurality of dual chamber pacing pulses so that the atrial chamber is captured by both the one single-chamber pacing pulse and the first one of the plurality of dual chamber pacing pulses; identify at least one intrinsic event subsequent to the plurality of dual chamber pacing pulses; and classify the detected tachycardia episode as one of ventricular tachycardia and supraventricular tachycardia in response to the at least one intrinsic event.