Cardiac pacemaker having a variable stimulation frequency

Details Cardiac pacemaker having a variable stimulation frequency Cardiac pacemaker having a variable stimulation frequency

Filed on

1987-07-27

Date issued

1989-08-15

Examiner

Jaworski, Francis

Patent Class

Surgery

SubClass

Truss

SubSubClass

Pad

Other Related Categories

A61N 100, H05G 0000

Type

Patent

Status

active

Patent number

048565210

Description

ABSTRACT:
A cardiac pacemaker includes a stimulation electrode connected to the atrium and a pulse generator coupled to the stimulation electrode and operable for producing electrical pulses at a selectable frequency. A monitoring electrode is connected to the ventricle and is operable for sensing excitation signals in the ventricle in response to the electrical pulses at the stimulation electrode. The timing means is coupled to both the pulse generator and the monitoring electrode and is operable for measuring the time interval between an electrical pulse at the stimulation electrode and the occurrence of the associated excitation signal. An evaluation means is coupled to the timing means and is operable for evaluating the time interval. The evaluation means is coupled to the pulse generator and is operable to change the frequency of said pulse generator.

REFERENCES:
patent: 4060090 (1977-11-01), Lin et al.
patent: 4108148 (1978-08-01), Cannon, III
patent: 4228803 (1980-10-01), Rickards
patent: 4527568 (1985-07-01), Rickards
patent: 4590944 (1986-05-01), Mann et al.
patent: 4624260 (1986-11-01), Baker, Jr. et al.
patent: 4712555 (1987-12-01), Thornander et al.
"Stimulation sequentielle et delai auriculo-ventriculaire optimal", J. C. Daubert, Ph. Ritter, Ph. Mabo, Stimucoeur T. 14, No. 2.
"Bifocal Demand Pacemaker", Barouh V. Berkovits, et al. Abstracts of the 42nd Scientific Sessions, Suppl. III to Circ. vol. XXXIX and XL Oct. 1969.
"The ideal Pacemaker", Werner Irnich, Offprint from Boston Colloquium on Cardiac Pacing, Martinus Nijhoff Medical Division, The Netherlands.
H. D. Funke et al. (1982) "VSAP: A Cardiac Pacemaker with Automatic Adapation of the Atrial Stimulation Rate", in Cardiac Pacing, G. A. Feruglio Ed., Piccin Medical Books, Padova, 1235-1238.

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