Synchronous pacemaker with upper rate stabilization and method o

Details Synchronous pacemaker with upper rate stabilization and method o Synchronous pacemaker with upper rate stabilization and method o

1976-01-12

1977-11-22

Kamm, William E.

Surgery

Truss

Pad

A61N 136

Patent

active

040591166

ABSTRACT:
A synchronous artificial cardiac pacemaker having a first electrode adapted to be coupled to the ventricle of a patient's heart to pick up ventricular heart activity and to conduct stimulating pulses to the ventricle, a second electrode adapted to be coupled to the atrium of a patient's heart to pick up atrial heart activity and a pulse generator powered by a battery power source and coupled to the two electrodes and to an indifferent electrode. The pulse generator includes a timing circuit that, in the absence of any heart activity for a predetermined maximum time interval, produces stimulating pulses at a lower base pacing rate. The pulse generator also includes a first sensing circuit coupled to the ventricular electrode and a reset circuit coupled to the timing circuit. Natural ectopic heart beats indicative of ventricular activity are picked up by the ventricular electrode, sensed by the sensing means and applied to the reset circuit which resets the operation of the timing circuit. A second sensing circuit is coupled to the atrial electrode and, through a memory circuit and a time delay circuit to the timing circuit. In cases where atrial heart activity is picked up, the sensing circuit produces a signal that sets the memory circuit and after a time delay, triggers the timing circuit into producing a stimulating pulse for application to the ventricle in synchronism with the natural atrial contraction of the heart. In cases where the atrial rate becomes excessive, the pulse generator circuit operates through an upper rate limit circuit coupled to the timing circuit and the operation of the memory circuit to synchronously pace the ventricles at an average rate not exceeding the upper rate of the timing circuit.

REFERENCES:
patent: 3253596 (1966-09-01), Keller, Jr.
patent: 3391697 (1968-07-01), Greatbatch
patent: 3648707 (1972-03-01), Greatbatch
patent: 3669120 (1972-06-01), Nielsen
patent: 3807410 (1974-04-01), Wall et al.
patent: 3903897 (1975-09-01), Woolons et al.
patent: 3920024 (1975-11-01), Bowers

Affiliated with

Also associated with

Rating

Synchronous pacemaker with upper rate stabilization and method o does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Synchronous pacemaker with upper rate stabilization and method o, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronous pacemaker with upper rate stabilization and method o will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2254610