DDD type cardiac pacemaker having automatic operating mode switc

Details DDD type cardiac pacemaker having automatic operating mode switc DDD type cardiac pacemaker having automatic operating mode switc

1991-12-24

1994-06-07

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 1368

Patent

active

053185943

ABSTRACT:
A cardiac pacemaker that is programmable to have one of a DDD and an AAI pacing mode of operation such that the pacing mode best suited to the patient's physiological condition is selected and implemented. The heart is paced in the AAI mode during periods of atrio-ventricular conduction. It automatically switches to pacing the heart in the DDD mode in response to a lack of atrio-ventricular conduction, and automatically switches back to the AAI mode after occurrence of a restoration event including restoration of atrio-ventricular conduction. Time delays for use in the DDD mode are calculated during operation in the AAI mode prior to loss of atrio-ventricular conduction and other timing delays for monitoring the patient's current physiological condition for mode switching are calculated.

REFERENCES:
patent: 4802483 (1989-02-01), Lindgren
patent: 4944298 (1991-07-01), Sholder
patent: 5133350 (1992-07-01), Duffin
The American Journal of Cardiology, vol. 52 No. 1, Jul. 1983, pp. 88-91; Rubin et al.; "Current physiologic pacemakers: a serious problem with a new device".
Girodo et al., "Improved Dual Chamber Pacing Mode In Paroxysmal Atrioventricular Conduction Disorders" PACE, vol. 13, Dec. 1990, Part II, pp. 2059-2064.
"Clinical Benefits of Automatic Upper Rate Behaviour in Dual Chamber Pacemakers", VITATEXT, Product Management Department, Vitatron Medical, Dieren, The Netherlands, Nr. 1, 1990, pp. 3-5.
U. Stierle et al., "A-V Delay Hysteresis: First Clinical Results", VITATEXT, Vitatron Medical Velp., The Netherlands, Nr. 1, 1990, pp. 10-14.
A. Sinnaeve et al., "Advantages of a Software Controlled Atrial Refractory Period in DDD Pacemakers", VITATEXT, Nr. 1, 1990, pp. 6-9.

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