Inventors:
Mohssen Fard - Woodland Hills CA, US
Xiaoyi Min - Thousand Oaks CA, US
Peter Boileau - Valencia CA, US
Jong Gill - Valencia CA, US
Bing Zhu - Sunnyvale CA, US
Jay Snell - Studio City CA, US
Laleh Jalali - Moorpark CA, US
Josh Reiss - Kirkland WA, US
Gene Bornzin - Simi Valley CA, US
Assignee:
Pacesetter, Inc. - Sylmar CA
International Classification:
A61B 5/0468
Abstract:
Techniques are described for efficiently detecting and distinguishing among cardiac ischemia, hypoglycemia or hyperglycemia based on intracardiac electrogram (IEGM) signals. In one example, a preliminary indication of an episode of cardiac ischemia is detected based on shifts in ST segment elevation within the IEGM. In response, the implanted device then records additional IEGM data for transmission to an external system. The external system analyzes the additional IEGM data to confirm the detection of cardiac ischemia using a more sophisticated analysis procedure exploiting additional detection parameters. In particular, the external system uses detection parameters capable of distinguishing hypoglycemia, hyperglycemia and hyperkalemia from cardiac ischemia, such as QTmax and QTend intervals. Alternatively, the more sophisticated analysis procedure may be performed by the device itself, if it is so equipped. Other examples described herein pertain instead to the detection of atrial fibrillation.