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:
Jun. 14, 1983
Filed:
Oct. 03, 1980
Robert R Brownlee, State College, PA (US);
Howard C Hughes, Jr, Cornwall, PA (US);
Paul H Neff, Bellefonte, PA (US);
G Frank Tyers, Vancouver, CA;
Research Corporation, New York, NY (US);
Abstract
A system for internally sensing the cardiac electrogram in a patient with a cardiac pacemaker is disclosed comprising an implanted electrode that, in combination with the metallic case of the pacemaker which acts as an indifferent electrode, senses cardiac electrical signals and provides them as an input to the pacer electronics. The sensing electrode is appropriately spaced from the pacing electrode and positioned so that cross coupling is minimized to permit sensing of the cardiac electrogram without undue interference from the pacing stimulus and after potentials, and so that the pickup of both R- and P-waves is optimized. The sensed signals may be used to control atrial, ventricular or multichamber demand pacemakers and/or may be telemetered out of the patient for pickup and analysis by external equipment. A flat plate and a preferred cylindrical ring form of electrode are described.