Method and apparatus for identifying oversensing using far-field intracardiac electrograms and marker channels
US8386024B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2009 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Nov 23, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3702
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for identifying and classifying various types of oversensing in implantable medical devices (IMDs), such as implantable cardioverter defibrillators (ICDs), to assist a physician in choosing corrective action to reduce the likelihood of oversensing and inappropriate therapy delivery. Far-field electrogram (EGM) signals are analyzed to detect the occurrence of R-waves, and the result is compared to the number and pattern of R-waves sensed by the IMD and indicated on the marker channel. A marker channel with more sensed R-waves than indicated by analysis of the far-field EGM indicates the presence of oversensing, including double-counting of R-waves, T-wave oversensing, lead malfunction or failure, poor lead connections, noise associated with electromagnetic interference, non-cardiac myopotentials, etc. Identification of the type of oversensing may be determined by analysis of the number and pattern of marker channel sensed R-waves with respect to the timing of the R-waves detected from the far-field EGM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.