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:
Feb. 12, 2008
Filed:
Mar. 25, 2003
Nils Holmström, Järfälla, SE;
Anna Norlin, Stockholm, SE;
Kenneth Dahlberg, Stockholm, SE;
Martin Obel, Danderyd, SE;
Nils Holmström, Järfälla, SE;
Anna Norlin, Stockholm, SE;
Kenneth Dahlberg, Stockholm, SE;
Martin Obel, Danderyd, SE;
St. Jude Medical AB, Jarfalla, SE;
Abstract
A heart monitoring device has a control circuit that derives an impedance value indicative of the impedance between different electrode surfaces. The control circuit determines and monitors a negative rate of change of the impedance value and determines whether the negative rate of change, or its absolute value, increases or decreases over a number of heart cycles. Alternatively or additionally, the control circuit may determine and monitor a relationship between a positive rate of change and a negative rate of change of the impedance value. The device can, in particular, be used to detect and treat a diastolic dysfunction of a heart.