Dual chamber pacing system with a mode switch

Details Dual chamber pacing system with a mode switch Dual chamber pacing system with a mode switch

2006-06-06

2006-06-06

Getzow, Scott M. (Department: 3762)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

Reexamination Certificate

active

07058448

ABSTRACT:
A dual chamber pacing system normally operates in an atrial synchronized mode, and includes a mode switch that switches the pacing mode to a non-atrial synchronized ventricular stimulating mode in response to the detection of an atrial tachyarrhythmia, and switches the pacing mode back to the atrial synchronized mode in response to, or after a preset time following, detection of cessation of the atrial tachyarrhythmia. A mode switch supervising circuit includes a counter that accumulates an amount of mode switches from a starting point, and supplies the accumulated amount to a comparator, wherein the accumulated amount is compared to a predetermined mode switch amount threshold. The mode switch supervising circuit controls the mode switch to lock the pacing mode to the non-atrial synchronized ventricular stimulating mode for at least a predetermined time period in response to the mode switch amount exceeding the amount threshold.

REFERENCES:
patent: 4802483 (1989-02-01), Lindgren
patent: 5309919 (1994-05-01), Snell et al.
patent: 5713938 (1998-02-01), Chiang et al.
patent: 5893882 (1999-04-01), Peterson et al.
patent: 1 048 322 (2000-04-01), None
“A New Automode Switch Algorithm for Supraventricular Tachycardias,” Levine et al., PACE, vol. 17, Nov. 1994, Part II, pp. 1895-1899.

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