Atrial arrhythmia detection for an active implantable...

Details Atrial arrhythmia detection for an active implantable... Atrial arrhythmia detection for an active implantable...

2006-09-26

2006-09-26

Pezzuto, Robert E. (Department: 3766)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

C607S014000, C607S027000, C600S510000

Reexamination Certificate

active

07113826

ABSTRACT:
Apparatus for detecting atrial arrhythmias in the treatment of disorders of the heartbeat rate in active implantable medical devices of the pacemaker, cardioverter, defribillator and/or multisite type. This device includes conventional systems, circuits and control algorithm for detecting spontaneous and stimulated ventricular events (R, V) and atrial events (P, A), indicating the delivery of a ventricular and/or atrial event, and inhibiting the detection of atrial events after detection of a ventricular event throughout a post-ventricular atrial absolute refractory period (PVAARP). Detecting atrial events includes protecting against the detection of atrial signals that do not correspond to an atrial event that has actually occurred, in particular protecting against atrial detection of far-field signals caused by a ventricular event. The protection operates by a dynamic adjustment of the sensitivity of detection by temporarily raising (t1, t2) a detection threshold (ΔS1, ΔS2) after detection of a ventricular event without detection of a preceding (spontaneous or stimulated) atrial event during the same cardiac cycle.

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