Active implantable device medical such as pacemaker,...

Details Active implantable device medical such as pacemaker,... Active implantable device medical such as pacemaker,...

2006-07-11

2006-07-11

Pezzuto, Robert E. (Department: 3766)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

C607S004000, C607S017000

Reexamination Certificate

active

07076297

ABSTRACT:
An active implantable medical device, such as a pacemaker, defibrillator and/or cardiovertor having an AAI and/or an AAI/DDD operating mode. This device detects atrial and ventricular events and stimulates the atrium, and calculates an atrial escape interval (AEI). The device defines a critical period preceding or following the end of the AEI and determines, in the event of detection of a ventricular extrasystole (VES), if the moment of occurrence of the VES is in the critical period. The device then recognizes a risk of inappropriate operation and/or false diagnosis related to the temporal proximity of the VES and end of the AEI. In such a case, the device modifies an operating parameter so as to eliminate this risk, for example, by resetting the counting of AEI (AEI*) on detection of the VES. The device can also inhibit a switching of AAI mode to a DDD mode in the event of risk of false diagnosis of atrio-ventricular block.

REFERENCES:
patent: 2001/0029392 (2001-10-01), Limousin
patent: 2002/0095183 (2002-07-01), Casset et al.
patent: 2002/0120301 (2002-08-01), Levine et al.
patent: 2004/0260349 (2004-12-01), Stroebel

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