Josh E Reiss

US Patent:

7756572, Jul 13, 2010

Filed:

Apr 25, 2007

Appl. No.:

11/740175

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

US Classification:

600517, 600516

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.

US Patent:

7424323, Sep 9, 2008

Filed:

Sep 1, 2005

Appl. No.:

11/218770

Inventors:

Josh Reiss - Sunnyvale CA, US
Paul A. Levine - Santa Clarita CA, US

Assignee:

Pacesetter, Inc. - Sylmar CA

International Classification:

A61N 1/362

US Classification:

607 9, 607 14

Abstract:

An implantable cardiac stimulation device prevents pacemaker mediated tachycardias during autocapture. The device includes a refractory circuit that establishes a lengthened post ventricular atrial refractory period (PVARP) in response to a lengthened AV interval. Such a lengthened AV interval may occur as a result of the provision of a back-up pacing pulse or fusion beat evaluation during autocapture.