Reverse pacing-mode switch

Details Reverse pacing-mode switch Reverse pacing-mode switch

2007-04-11

2011-11-08

Layno, Carl H (Department: 3766)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

C607S002000, C607S017000

Reexamination Certificate

active

08055339

ABSTRACT:
A device comprises a cardiac contraction sensing circuit, a timer circuit, an electrical stimulation circuit, and a controller. The timer circuit provides a time duration of an atrial-atrial interval between successive atrial contractions, a ventricular-ventricular interval between successive ventricular contractions, and an atrial-ventricular (A-V) interval between an atrial contraction and a same cardiac cycle ventricular contraction. The controller includes an event detection module and a pacing module. The event detection module is configured for determining whether A-V block events are sustained over multiple cardiac cycles. The pacing module is configured for providing pacing therapy according to a primary pacing mode that includes AAI(R) mode with independent VVI backup mode, and for switching the pacing therapy to a secondary pacing mode if A-V block events are sustained over multiple cardiac cycles. Other devices and methods are described.

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