Dual chamber pacemaker with adjustable blanking and V-A extensio

Details Dual chamber pacemaker with adjustable blanking and V-A extensio Dual chamber pacemaker with adjustable blanking and V-A extensio

1989-10-23

1990-11-06

Cohen, Lee S.

Surgery

Truss

Pad

A61N 100

Patent

active

049677462

ABSTRACT:
A dual chamber pacemaker with variable V-A delay based on detection of multiple criteria before lengthening the V-A delay period. Before the V-A delay period can be extended, the pacemaker must be stimulating the ventricle at a maximum ventricular rate, and an atrial event must be sensed in a relative atrial refractory period. During this interval the pacemaker would not respond to an atrial event that was sensed, but the occurrence of the event would be detected. To optimize a ventricular blanking period, in each cardiac cycle, the energy level of the atrial output pulse and the sensitivity of the ventricular sense amplifier are sampled. Based on these dynamic parameters, the duration of the ventricle blanking period is adjusted for each cycle so that a minimum ventricular blanking period can be maintained without cross-talk.

REFERENCES:
patent: 4284082 (1981-08-01), Funk et al.
patent: 4624260 (1986-11-01), Baker, Jr. et al.
patent: 4825870 (1989-05-01), Mann et al.

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