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:
Jul. 31, 2001
Filed:
Nov. 07, 1990
Applicant:
Inventors:
Francis J. Callaghan, Miami, FL (US);
William Vollmann, Lauderhill, FL (US);
Assignee:
Pacesetter, Inc., Sylmar, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61N 1/372 ;
U.S. Cl.
CPC ...
A61N 1/372 ;
Abstract
A rate-responsive pacemaker which is provided with a closed-loop control system whose rate control parameter is the depolarization gradient. Any difference between the measured value of the rate control parameter and a target value is used to change the pacing rate in a direction which tends to minimize the difference. To calibrate the system for long-term changes due to drugs and the like, the target value is changed in each measurement cycle in accordance with prescribed rules.