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:
Sep. 05, 1995
Filed:
Jul. 22, 1994
Max Schaldach, Erlangen, DE;
Biotronik Mess-und Therapiegerate GmbH & Co., Berlin, DE;
Abstract
A demand cardiac pacemaker implantable in a patient which includes a pulse generator which generates stimulating pulses at a controllable variable rate and has electrodes for applying stimulating pulses from the pulse generator to the heart of a patient. The length of the pre-ejection period (PEP) for the left ventricle in each heart cycle, which length is a function of the physiological demand of the patient, is detected and an output signal which is a function of the length of the pre-ejection period is produced. This output signal is used to control the pulse generator to produce stimulating pulses at a rate based on the output signal, and to apply the stimulating pulses to the electrodes in the absence of spontaneous heart action.