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:
May. 08, 2007
Filed:
Oct. 04, 2002
Kjell Norén, Solna, SE;
Karin Ljungström, Hässelby, SE;
Sven Kalling, Täby, SE;
Lars Mandal, Solna, SE;
Anders Björling, Järfälla, SE;
Kjell Norén, Solna, SE;
Karin Ljungström, Hässelby, SE;
Sven Kalling, Täby, SE;
Lars Mandal, Solna, SE;
Anders Björling, Järfälla, SE;
St. Jude Medical AB, Jarfalla, SE;
Abstract
In an implantable heart stimulating device, system and method, electrical stimulation pulses are delivered to first and second ventricles of a heart with a variable time interval therebetween, and signals are sensed at two different positions in the heart, from which an impedance value is derived. A minimum value and a maximum value of the impedance value are determined during a heart cycle, and a relationship between the minimum and maximum values also is determined. The time interval is varied and the relationship is monitored over a number of heart cycles. The time interval is set so that the relationship satisfies a predetermined requirement.