DISCRIMINATION BETWEEN EFFECTIVE AND INEFFECTIVE ATRIAL PACING PULSES IN AN ACTIVE IMPLANTABLE MEDICAL DEVICE OF THE PACEMAKER TYPE
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United States of America Patent
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Issued Date -
Jul 5, 2007
app pub date -
Jul 5, 2006
filing date -
Jul 12, 2005
priority date (Note) -
Abandoned
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Abstract
An active implantable medical device of the cardiac pacing, resynchronization, defibrillation and/or cardio version type able to discriminate between effective and ineffective atrial pacing pulses. This device delivers atrial pacing pulses, collects an endocardial atrial signal, and senses atrial capture. It is able to recognize the presence of an evoked wave consecutive to the delivery of the pacing pulse, by an analysis of the variations of a second derivative of collected signal. A function is calculated based on integrating, over the duration of a window (F) of post-atrial pacing (StimA) atrial sensing, the absolute value of the second derivative (S'') of collected signal (S). The discrimination between effective pacing pulses and ineffective pacing pulses is performed in response to the comparison of a characteristic parameter of said function with a predetermined criterion.
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