Patent ID: 7539540
Filing Date: 2009-05-26
Classification: A61B,A61N

Abstract:
1. A medical system, comprising: an implantable device including a housing and a signal storage element enclosed in the housing, the housing forming an electrode of the device; an implantable medical electrical lead including a first electrode and a second electrode, the first and second electrodes forming a sensing pair when the lead is coupled to the device; and a device processor enclosed in the housing and programmed to detect noise on the sensing pair, identify the noise as system noise, and store at least one noisy EGM sample from the sensing pair and a concurrent EGM sample from each of a plurality of recording pairs in response to identifying the system noise, wherein the plurality of recording pairs includes a first pair formed by the first lead electrode and the device electrode, when the lead is coupled to the device, and a second pair formed by the second lead electrode and the device electrode, when the lead is coupled to the device.