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. 04, 1996
Filed:
Sep. 20, 1994
Frits M van Krieken, Dieren, NL;
Vitatron Medical, B.V., Dieren, NL;
Abstract
A pacemaker system and method are provided with an improved way of detecting the presence of noise, and particularly intermittent noise. When a first signal is sensed by the pacemaker sense circuit, the pacemaker schedules and starts to time out a next escape interval while continuing to time out the escape interval which was previously set. The pacemaker sets up a predetermined noise interval and continues to monitor senses, for the purpose of determining whether the first sense is to be treated as a true cardiac signal, or as noise. In the preferred embodiment, if a second sense occurs within the noise interval, and before time out of a minimum pacing interval, the first sense is determined to be noise, and the pacemaker continues to time out the initial escape interval; however, if no additional sense occurs during the noise interval, the pacemaker proceeds to time out the previously set next escape interval. In the case of a second sense within the noise interval but after time out of the minimum pacing interval, the second sense triggers a safety pace, to protect from continuous inhibition by pulsed noise.