The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 2010
Filed:
Nov. 13, 2006
Dan E. Gutfinger, Irvine, CA (US);
Neal L. Eigler, Pacific Palisades, CA (US);
Dorin Panescu, San Jose, CA (US);
James S. Whiting, Los Angeles, CA (US);
Dan E. Gutfinger, Irvine, CA (US);
Neal L. Eigler, Pacific Palisades, CA (US);
Dorin Panescu, San Jose, CA (US);
James S. Whiting, Los Angeles, CA (US);
Pacesetter, Inc, Sunnyvale, CA (US);
Abstract
Techniques are provided for estimating left atrial pressure (LAP) or other cardiac pressure parameters based on various parameters derived from impedance signals. In particular, effective LAP is estimated based on one or more of: electrical conductance values, cardiogenic pulse amplitudes, circadian rhythm pulse amplitudes, or signal morphology fractionation values, each derived from the impedance signals detected by the implantable device. Predetermined conversion factors stored within the device are used to convert the various parameters derived from the electrical impedance signal into LAP values or other appropriate cardiac pressure values. The conversion factors may be, for example, slope and baseline values derived during an initial calibration procedure performed by an external system, such as an external programmer. In some examples, the slope and baseline values may be periodically re-calibrated by the implantable device itself.