Patent ID: 8688203
Filing Date: 2014-04-01
Classification: A61B,A61N

Abstract:
1. A system comprising: a first cardiac signal sensing circuit operable to sense at least a first intrinsic cardiac signal, wherein the first intrinsic cardiac signal is associated with a ventricular depolarization of a heart, and wherein the first sensing circuit is configured to detect bradyarrhythmia; a second cardiac signal sensing circuit operable to sense at least a second intrinsic cardiac signal, the second intrinsic cardiac signal also associated with the ventricular depolarization of the heart, wherein the second sensing circuit has a higher signal sensing sensitivity than the first sensing circuit and is configured to detect tachyarrhythmia; a pacing therapy circuit; and a controller circuit coupled to the first and second cardiac signal sensing circuits and the pacing therapy circuit, the controller circuit operable to adjust a sensing threshold of the first cardiac signal sensing circuit based on a comparison of outputs of the first and second cardiac signal sensing circuits.