Patent ID: 8050757
Filing Date: 2011-11-01
Classification: A61B,G16H

Abstract:
1. An implantable cardiac defibrillator configured to be coupled to a first defibrillation electrode, a second defibrillation electrode, a supraventricular pacing electrode, and a further pacing electrode, the defibrillator comprising: a sensing system configured to be coupled to the first defibrillation electrode, the second defibrillation electrode, and the further pacing electrode, and the sensing system configured to detect a first cardiac signal between the first defibrillation electrode and the second defibrillation electrode and a second cardiac signal through the further pacing electrode; a control system coupled to the sensing system and configured to monitor the first cardiac signal for first cardiac complexes including first model cardiac complexes and first sensed cardiac complexes and the second cardiac signal for second model cardiac complexes; a pace output circuit coupled to the control system and configured to be coupled to the supraventricular electrode and deliver electrical pulses to the supraventricular pacing electrode under control of the control system, wherein the control system is configured to monitor the first cardiac signal for the first model cardiac complexes and the second cardiac signal for the second model cardiac complexes as the electrical pulses are delivered to the supraventricular pacing electrode; a morphology analyzing circuit coupled to the control system and configured to create a template feature vector using the first model cardiac complexes and the second model cardiac complexes; and a vector comparison circuit coupled to the morphology analyzing circuit and configured to classify each of the first sensed cardiac complexes as being between a ventricular tachycardia complex or a supraventricular complex using the template feature vector.