Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Reexamination Certificate
2006-10-31
2006-10-31
Pezzuto, Robert E. (Department: 3766)
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
C607S119000
Reexamination Certificate
active
07130685
ABSTRACT:
The present invention is directed to the problem of preventing episodes of “AV Desynchronization Arrhythmia” (AVDA), a dual-chamber pacing behavior that is initiated by a PVC or other ventricular event that is not closely preceded by an atrial depolarization event. If the initiating PVC creates retrograde conduction resulting in an atrial refractory-sensed event, and should the succeeding AP fail to capture due to pacing within the atrial refractory period (ARP) a repetitive AVDA sequence (APineffectual-VP-ARrefractory) can persist for an extended period of time and symptoms of pacemaker syndrome can occur. After AVDA detection, the following may occur: delivered atrial pacing (AP) energy may be (dynamically) increased, a atrial pacing (AP) delay interval may be implemented, a mode-switch may be executed, a patient notification process may begin, a histogram may be recorded or processed, and/or a combination thereof may be used in response the detected AVDA sequence.
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Betzold Robert A.
Casavant David A.
Sweeney Michael O.
Gedeon Brian T.
McDowall Paul H.
Medtronic Inc.
Pezzuto Robert E.
Wolde-Michael Girma
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