Pacemaker with physiological control of stimulation

Details Pacemaker with physiological control of stimulation Pacemaker with physiological control of stimulation

1994-07-22

1995-09-05

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 1365

Patent

active

054475236

ABSTRACT:
A demand cardiac pacemaker implantable in a patient which includes a pulse generator which generates stimulating pulses at a controllable variable rate and has electrodes for applying stimulating pulses from the pulse generator to the heart of a patient. The length of the pre-ejection period (PEP) for the left ventricle in each heart cycle, which length is a function of the physiological demand of the patient, is detected and an output signal which is a function of the length of the pre-ejection period is produced. This output signal is used to control the pulse generator to produce stimulating pulses at a rate based on the output signal, and to apply the stimulating pulses to the electrodes in the absence of spontaneous heart action.

REFERENCES:
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patent: 4428378 (1984-01-01), Anderson et al.
patent: 4513743 (1985-04-01), Van Arragon et al.
patent: 4527568 (1985-07-01), Rickards
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patent: 4552154 (1985-12-01), Hartlaub
patent: 4600017 (1986-07-01), Schroeppel
patent: 4708143 (1987-11-01), Schroeppel
patent: 4719921 (1988-01-01), Chirife
patent: 4730619 (1988-03-01), Koning et al.

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