Detection and confirmation of cross-sensing phenomenon in active

Details Detection and confirmation of cross-sensing phenomenon in active Detection and confirmation of cross-sensing phenomenon in active

1998-04-28

1999-11-02

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 137

Patent

active

059787082

ABSTRACT:
An active implantable medical device, especially of a cardiac pacemaker, defibrillator and/or cardiovertor type, having a dual chamber stimulation function and protection against cross-sensing atrio-ventricular phenomena. Cardiac events, spontaneous or stimulated, are detected in a first cavity, preferably the atrium, and a second cavity is stimulated, preferably the ventricle, The detection and confirmation of cross-sensing is performed by detecting in the atrium a signal coming from a depolarization consecutive to a preceding stimulation of the ventricle, and distinguishing such a signal from a signal resulting from spontaneous activity of the atrium. According to an embodiment, the detection of cross-sensing preferably includes the detection of an activity of the atrial extra-systole type occurring between a ventricular stimulation and a consecutive atrial event, stimulated or spontaneous, in order to determine that the interval of time between the stimulation of the second cavity and the atrial extra-systole type is less than a predetermined duration, and to detect the stability of this interval, preferably by modulating the atrio-ventricular delay (AVD) and to detect the absence of significant modification, with regard to these variations, in a particular time interval in question.

REFERENCES:
patent: 4967746 (1990-11-01), Vandegriff
patent: 5167224 (1992-12-01), Limousin et al.
patent: 5226415 (1993-07-01), Girodo et al.
patent: 5247929 (1993-09-01), Stoop et al.

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