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:
Mar. 07, 1995
Filed:
Sep. 09, 1993
Anders Lindgren, Taeby, SE;
Per Franberg, Stockholm, SE;
Siemens Elema AB, Solna, SE;
Abstract
A heart stimulator is disclosed which is capable of sensing and stimulating both the atrium and the ventricle in a heart such that a ventricular stimulation pulse is emitted, either after expiration of an atrioventricular interval following a stimulated or spontaneous atrial event, or after expiration of a minimum synchronous interval following a stimulated or spontaneous ventricular event, depending on which of the two intervals expires last. After each ventricular event, an atrial refractory period is imposed during which atrial detections are interpreted as noise. Operation of the heart stimulator when the atrium's spontaneous rate is faster than a stimulation rate corresponding to the minimum synchronous interval is improved by measuring the interval between atrial events. If a detection during the atrium's refractory period occurs at a time corresponding to the latest interval timed, the detection is interpreted as an approved atrial event, and a ventricular stimulation pulse is emitted after expiration of the minimum synchronous interval.