Patent ID: 7536224

Claim:
An implantable medical device, comprising: a therapy delivery circuit to generate a therapy; a sensing circuit to receive cardiac signals; a plurality of electrodes coupled to the sensing circuit and the therapy delivery circuit sensing cardiac signals and delivering the therapy; and control circuitry coupled to the therapy delivery circuit and the sensing circuit, the control circuitry configured to receive cardiac signals from the sensing circuit, determine a need for delivering the therapy, initiate the therapy within a first chamber of a heart in response to the determined need, detect pro-arrhythmia in a second chamber of the heart different from the first chamber in response to the cardiac signals, the detected pro-arrhythmia occurring in the second chamber in response to the delivered therapy in the first chamber, and to control the therapy delivery in the first chamber in response to the pro-arrhythmia being detected in the second chamber, wherein the therapy corresponds to atrial pacing and the control circuitry detects ventricular pro-arrhythmia and terminates the therapy delivery in response to the ventricular pro-arrhythmia being detected, and wherein the control circuitry is further configured to detect an approximately 1:1 conduction pattern between the atrium and ventricles of the heart in response to the sensed cardiac signals, wherein the ventricular pro-arrhythmia is detected in response to detecting the approximately 1:1 conduction pattern.